PDF malware analysis — malicious · 8b0e773584828102

MALICIOUS

PDF

94.8 KB Created: 2021-07-14 03:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 1eb0943b0f8ad1babcb2534db87e3bbd SHA-1: c3570a1d67afb4b3517a1074fdcdc6f2eb69b15b SHA-256: 8b0e773584828102bde3c59f1c12465e1cfb2f2a2949c5042c4fd5f08c579016

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links to external websites, many hosted on disposable domains or compromised CMS uploads, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns strongly suggest exploitation for client execution via a malicious link.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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 http://hb1004.com/userData/board/file/90801473591.pdf In PDF document text
- http://bet-balance.com/userfiles/file/vidizikunepukifoma.pdfIn PDF document text
- http://ecohort.com/userfiles/files/reretumesosujen.pdfIn PDF document text
- http://klubbelgickychobrov.sk/editor_uploads/files/rafusimopo.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609784fae57e0---dofuxitu.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5rrk6k7r9vpkrkmctdem8ncib4/bavazezaxotet.pdfIn PDF document text
- http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/tuvazit.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2db6c7e0b---53176465864.pdfIn PDF document text
- http://euro520.net/userfiles/file/1624126850397508746.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f84fa74ea---4791902183.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd05dc92c97---pagusevo.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c69fa3310b---21899988015.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bntndks7r7p70cgoeoas4c6c22/76262639605.pdfIn PDF document text
- https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/p0013fvj88bhmhbhkn7vt55uvh/69962112864.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ikmoq42a4mmjjkfcnt8g2s4u95/99667568068.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/31bf429d6960f4baaa13e196db1fae5a/92624216019.pdfIn PDF document text
- https://alajuusa.eemedia/contents/file/dafebuvakinanalisakavil.pdfIn PDF document text
- https://castilloexterior.es/ckfinder/userfiles/files/2234983801.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160cadf6a7f73d---gaxatodukifazesonera.pdfIn PDF document text
- https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/e09a3798bf5e311e1d94d4b2d8fa96fd/5721133877.pdfIn PDF document text
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4395ead2a---sofebelerawipakesa.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093d50bf1bcf---95213457266.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/56b08a2df5dfb49b6ee538335c0f23a7/vopobosax.pdfIn PDF document text
- https://marosme.ro/hirek/file/mafevowugu.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59b75ff54---38513775795.pdfIn PDF document text
- http://jar-ted.pl/file/50630911920.pdfIn PDF document text
- https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081438c71a7e---65657544904.pdfIn PDF document text
- http://loaamtran.com/files/usersfiles/files/51257311667.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=haunani+kay+trask+from+a+native+daughterPDF 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_off0000f77a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF77A	17856 bytes
SHA-256: `87e6ef7ba5723b1c1a20599add9dffaae0574da681a44f384eb52912e711c9b4`
`font_01_sfnt_off000125eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125EB	16164 bytes
SHA-256: `fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467`
`font_02_sfnt_off00013b61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B61	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00015378.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15378	11120 bytes
SHA-256: `b6f85ab15efc559762e02e4377742792a492208431d5696bb45dbec06eb9e748`

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