Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6de03902c2b97a…

MALICIOUS

PDF

89.8 KB Created: 2021-07-13 16:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c1cc62d9c9eb12f46c4f14dbb0892b44 SHA-1: a979fb9ffa559507e0fbf21eafb4236ba3a512ed SHA-256: fd6de03902c2b97aa39a497b83abcfdb130aab3af095e9d7688501b0c70beb76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fac0f2a92---dodewedidale.pdf In PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-26/20210626165922394620.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b03e009790d3d6a92b2dd7d602295096/poxanulixuzi.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/71580877078.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/15760300368.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/jatelofepivibofuf.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091324300271---poniz.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/541393834.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/06a224d641bb64dd487ef783532169ae/xofobudigekezi.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160717b2bb63af---riwesikikudugasaxaxem.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/vomelemugikifuguname.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2f448e3cb0388d2157878611caa0e79/sosewitujimimuzofevo.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e35a0c634---66875571926.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a512d130105090997585cf07c9fecb0b/bifulakemiz.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/dbf4f1a4ccc19c5a517476c6f37f2d30/97072588399.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/90804953257.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fa4092cc2---wavubugepedo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b2254896---mepugizijiv.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9c26c095f---56968313452.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/mivolapasibokumalawuki.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c5e24abcb---85063452680.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/90874165114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=all+psp+games+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 10512 bytes
SHA-256: f34dea03cb3215576858840feebe3b4dafd8d3f82db6649d8d9d9e9943d4ff1c
font_01_sfnt_off0001122e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122E 17760 bytes
SHA-256: 15ea3631558b1827eb3b262acdc57926b6c4b47870a6a4ddd4e5cde9d342afd2
font_02_sfnt_off000140dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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