PDF malware analysis — malicious · ce901466ceb7f2a3

MALICIOUS

PDF

85.2 KB Created: 2021-06-25 21:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: e6a56fdbe3d40419c7d38689dca2fd5b SHA-1: 058cd1a32ff6ee2cfc3d4d13687a3ae711c43665 SHA-256: ce901466ceb7f2a36ba7a4d53bc520a015f7a0c9bed5a840ac2b6b19f1110b8f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, pointing to compromised WordPress upload storage and disposable hosting, likely to distribute further malicious content. The presence of an 'invoice lure' heuristic further supports the phishing pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.9762

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/7tn7q3mvoee752omca5vku4dq3/190725203.pdf In PDF document text
- http://assushop.com/userfiles/assushop.com/file/40822508560.pdfIn PDF document text
- http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160769b128e0ac---kusanuxir.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fcfd1a00e---rukibagediwonekuxowozavuz.pdfIn PDF document text
- http://maidichike.com/upload/files/88229584928.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/5cv5ajf38269vg1g4a19a1325s/rimunikinar.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2aa574d3b---86075341015.pdfIn PDF document text
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/9of4h4uhrd4dp1u5071vadecvl/fuwujigazejitijarujowa.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41cd5f209---tarapowikinumomabufises.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/abeaa1975b2059d3af39c140c3558d64/20609937246.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/37po2n7lr7ub503a31ni01d388/77407848845.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ae9fab9b928708cc8ec1e676dc4afaff/25620116851.pdfIn PDF document text
- https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/1a527b4fd2d7b4a1a2ccc59beee16de2/geribozeju.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7dapr6d7042bnen6habk8ckig7/tozobukofob.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/c56b860482098f19c398a631333300d0/94478042120.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/50f85dc0cde610514efed0f6b1b29a57/tupelomisupolefopuvadijug.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3e6c03d97e873fcd214ab3f36ea3066c/87805737749.pdfIn PDF document text
- https://geneticapanama.com/userfiles/file/94757692088.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/makefixupokulaxu.pdfIn PDF document text
- http://bfr-bialapodlaska.pl/userfiles/file/vowaj.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae821726204---nelabeputum.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a77e2aae8f0---74905793547.pdfIn PDF document text
- http://bendhorseride.com/userfiles/file/vuvitajafidapejikano.pdfIn PDF document text
- http://ainut.fi/userfiles/file/52845642824.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/725e8e8b41b9b15d079bdaee4955ea35/lotojexusikegojomun.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946d710a799---zurenekijepano.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c28506d821d---97225626730.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=nfc+function+switchPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE74	1692 bytes
SHA-256: `6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13`
`font_01_sfnt_off0000e67d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE67D	10156 bytes
SHA-256: `7e07edc5789fd893935a8d5c9bc530e3106b7756efc61d251a13696f281b3377`
`font_02_sfnt_off0000fd3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001154e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1154E	18196 bytes
SHA-256: `96e421d5e40579e69a5bd9f3844a966a80256bb2015590de56600fde619eb08c`

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