Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e467a93854920f5…

MALICIOUS

PDF

78.4 KB Created: 2021-06-30 22:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fe54d3f43db5d938ab9f244218c7be8 SHA-1: 329fa8c7d20ac2f76ab0d0ed1dda6a3e18169b8c SHA-256: 9e467a93854920f5d7a0d3a8b5c8a83338f05d61d09ea29611f9ab8da0a1e88d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/6f0cc15d5b17c07bf3bb3d6af9815c12/potesup.pdf
    • http://angelescare.com/userfiles/file/lasivir.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/9a7c28e5aae54446775cf6ed4e16ad36/faduzuwikusopepakefi.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab51ea4b226---vamadovebafeluj.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f57bbc476a73ba48cb88f077c230fe8f/58477985325.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c948a56ddf4---72134728447.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6560a3b64---81696348413.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/f2cfa93eb0ab63ee00ea4b445b87cd11/45873806475.pdf
    • http://simonhoirup.dk/userfiles/file/damokafop.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f26d0502b---detaxevarejimova.pdf
    • http://starsunited.at/upload/files/numusaduboles.pdf
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuxisesovep.pdf
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/fugufesoxowad.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/7cf816af886cbc6d54ffabff7abadd93/53966483834.pdf
    • https://areicon.com/images/file/karijilusiretewitoneno.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96d137da4c---11401460682.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/4ns0gnaa4q272edva8v9rflo34/dilotigoxowute.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fb384bfd0---pugagisojifikuf.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/28da43cdd7eb62c26ab88871337a19a4/tovavof.pdf
    • http://shuswapladystriders.ca/userfiles/file/jiguwufigexibedokosopagid.pdf
    • https://nnkcreations.com/userfiles/file/bumidotekozevana.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=white+collar+live+feed
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d108.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 16792 bytes
font_01_sfnt_off0000e91a.bin
6d020671427e7662ca5dd057823dd9128b225a5701b7410be6595f806215230b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91A 16364 bytes
font_02_sfnt_off0001139c.bin
19036ecd18492d1877aa45bbb4e5ed33f9ce9292d57a44191e6819ea37fd303c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1139C 10360 bytes