PDF malware analysis — malicious · ffd59d1565e4dbf2

MALICIOUS

PDF

92.7 KB Created: 2021-08-07 10:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 08ae165238f584d173e758285a0805fc SHA-1: a4ae183636590b45d68aea68472db0ee8b1c9b95 SHA-256: ffd59d1565e4dbf24aa2b1155dc0354f4c7a58c68991ca7521983f7e742d72aa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF sample was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and link farm indicators strongly supports a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9923

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://studiotecnicomartani.eu/userfiles/files/wisivinagusixeme.pdf In PDF document text
- http://phutunggiahungoto.com/uploads/files/zexoxudopidexiseg.pdfIn PDF document text
- http://waypl.pl/upload/File/nebemesenedojivikowa.pdfIn PDF document text
- http://thesnowmanicecream.com/ckfinder/userfiles/files/45977305937.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/af427b6d531c45a599138d835a837ab0/31966572294.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/200a605bab2c135365c104d7279277db/wedem.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6942bb65f37c902cd63e94ab4da2de8c/palapazikutanusomabizusov.pdfIn PDF document text
- http://assushop.com/userfiles/assushop.com/file/56979101881.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e3570a81f---posuki.pdfIn PDF document text
- https://coastalstudio.com/images/main/file/13467600053.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/8uet4dq60brb82l3prlsf27ur2/sogej.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a364e5a3ce3---23043583726.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096500fd4210---4471392995.pdfIn PDF document text
- http://elandtour.com/FileData/ckfinder/files/20210719_2ECF149676245F78.pdfIn PDF document text
- http://crosswaysrecruitment.com/userfiles/file/61406002297.pdfIn PDF document text
- http://handbook.hu/upload/page/file/puzakerafe.pdfIn PDF document text
- https://menu2uplus.com/images/file/33305989713.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de774d2b0e3---7650672301.pdfIn PDF document text
- https://ascinfratech.com/clientprojects/trading/file/tanifalawekamasofolak.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a4da16c28a6c39025b3aacfdc4f6ca12/492517312.pdfIn PDF document text
- http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa6dae8ab28---90963414365.pdfIn PDF document text
- https://sanvexe.vn/webroot/img/files/dagamigomusomalafofag.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dafb033a9---fagoma.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bbefdc09d---tinubevoxovezisilesepofu.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/43f222dbe8064f0e3b17277c3fb37e5a/tiniwo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=iron+man+3+game+download+for+android+apk+%2B+obbPDF 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_off0000f099.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF099	17208 bytes
SHA-256: `70c0dada89b2272674feb7957c2f4cc95ba1e50a8c069daa332f683141695dac`
`font_01_sfnt_off00011da4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DA4	16144 bytes
SHA-256: `fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516`
`font_02_sfnt_off00013324.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13324	11016 bytes
SHA-256: `6a2173676bdcad6365ed9ebd7fb89e97065220b27004b6188e21a8a2f1d04b60`
`font_03_sfnt_off00014c4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C4A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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