Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf15b2f85379030…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 15:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 027288b7ebf7f1b2bfd34aefe45f0094 SHA-1: 350bb56e5337ff80953d9a5770f122d64d68bf2c SHA-256: eaf15b2f853790300c50e435b15e205249b75d8e504e1d44682a072335a065f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the document being a link farm hosted on compromised or disposable domains, designed to redirect users to potentially malicious PDF files. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b85129a2e63---dakidaluvozuvezafiga.pdf
    • https://samsungdvmklima.com/upload/ckfinder/files/leladeneguj.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd082610eb---maxetumowifajofekitabo.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606da89042429---569982826.pdf
    • http://ranjitabiswas.com/userfiles/files/kirulenubebokubuvud.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b4248a60b---43699738087.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d356df2220---400241588.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/g8n568lm8olr5a3g7hbsupvkhl/42558728115.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/6c9e6e56277d4555eea06273c46c5ac6/mufozemokujis.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/561250537c07c0f1ffbea781af9338d1/14814324189.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/5soufp8qpv1qlqorq84bc069s6/ferexaruvubo.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609289dacf8ec---liwumojonofigakonaniga.pdf
    • https://monyetjoget.com/contents//files/75135874768.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b117fb40de7---83095137399.pdf
    • https://dm288.com/slicice/file/82262870693.pdf
    • https://skyzoan.com/cake/beta/userfiles/file/44050443448.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf85393bd05---disegovuzosofa.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s5be1749tbkdhsq62udtf5gsi7/5487380494.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160779dea3434a---jitipizituxigirida.pdf
    • http://jyjwqj.com/uploadfile/file///2021052920555263.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r2pg7rkpimfd2otekt7cph5o9q/3961605262.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/nedigago.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073c91b9e944---kewadazesizirifuvitor.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=the+seven+days+of+the+week+in+french
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f101fc9f7989e097387d6b5170b95b2c/juzenuled.pdf
    • 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_off0000f68a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 16792 bytes
font_01_sfnt_off00010ea1.bin
a727628dfc5583bd44cb42d30f0a905fff288dc42b4d8aa264d021972b77d48d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 10848 bytes
font_02_sfnt_off000127c5.bin
63e217510ed24819e479c29c2a71afa872bc95c97a6a44389d7c5aa094f462ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C5 17120 bytes

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