Malicious PDF — malware analysis report

Static analysis result for SHA-256 785dbebf19c87ea2…

MALICIOUS

PDF

101.0 KB Created: 2021-06-27 12:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7a8e1310fbc2a31467361d82df5c247f SHA-1: afe6873c32c36bf442d387b104463ac276c7223c SHA-256: 785dbebf19c87ea2f25536edce46ecfdfada364b4b7272f1eae43b6e82b7ff20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to websites hosted on compromised WordPress installations or other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the nature of the document as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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://areicon.com/images/file/70225390605.pdf In PDF document text
    • https://calmoinc.com/upload/editor/file/42074018550.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/zibonowoxaxuxurikowisa.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/d0f3554a1568263119fd9f9caf9b7dba/rumokisativegor.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/d5096620f2c7adcffc551d2d32503c07/xosemanurunirigemarilosel.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/d0cc71983b67d588975e1362aa5769e3/33565542204.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e8075a7836f4ede1fa8d936a4ff2baee/tatorumisulezokok.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092e1b5e5a15---witul.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/42264223414.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/c52a88ea50c4ccab5a3867cc1f3802df/40342342178.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/geleluledazutez.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af7a0ea9338---mavit.pdfIn PDF document text
    • https://chpcentre.com/files/file/72643630362.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a706639aaec---5049795721.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/lugig.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba74bc6966---pejuzotun.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/sbr8vorl4vdh7a1gjthbq75kd1/lovidatufotudu.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/vodavatogad.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/31324863456.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/35296686310.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b1f135a26e441929e3d26f0849dc00be/bamod.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5f0ab981---dajezubimenaj.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/15b555dcec75249209e335524b46f094/lorinedopiditogifofodaf.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/k7rd9d866a6q1rcdkd18mc5ua8/kajumenetubodogawis.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609152bac62e5---dowilajadi.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/h7ehi3g3cg1h6fs8jct9re0hv7/94992478368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=defense+meaning+in+tamilPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f29d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF29D 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_01_sfnt_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_02_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 10336 bytes
SHA-256: 111c731c97b3866126eb27e0fcb5f02737d59230c652d2197a8f435361fcd821
font_03_sfnt_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 22936 bytes
SHA-256: 3c581f3c95d7e9f060f3f546fb88f0809e34c3f4242ba2c0874a5487a0f1a5f4
font_04_sfnt_off00016dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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