Malicious PDF — malware analysis report

Static analysis result for SHA-256 968c924a47b31344…

MALICIOUS

PDF

85.0 KB Created: 2021-08-26 00:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d1e422e1b0861ba817bca4cdd635b2d SHA-1: ffd80b8352da23cdd5691da71578b64748ad8b7d SHA-256: 968c924a47b31344c4a1f7ff9591ee8829ee5496721149d0f22c31faaed1e291
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites, including one using a raw IP address. The presence of embedded URLs and the nature of the heuristics suggest this PDF is designed to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/23107037969.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9d066b15---59286152305.pdf
    • http://autoklej.pl/app/webroot/media/files/20592866876.pdf
    • https://zionapostolicministries.org/uploads/file/muzefakikedewiniwip.pdf
    • https://najlepsze-w-polsce.pl/uploads/26603212229.pdf
    • http://gesundezellen.de/neu/userfiles/file/23778250694.pdf
    • http://akicgiyim.com/userfiles/file/vetivojufajurijaj.pdf
    • http://beachfirebrands.com/userfiles/file/13923788368.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4bd1c3c0b8db70925930af532f14636a/10069086351.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/e83321020fc76b86beeb642ecef08cc4/kibed.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/14892509604.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/q97o02026atiqrdhnh0n71veoh/8134925540.pdf
    • http://lblussana.it/images/file/27909100097.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/06ccc39e601324ec9fd81e9681526912/41260940883.pdf
    • http://3q1p.com/upload/file/210811200142796876mljdoogu64na.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad4813d5ef---6381154443.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d2ca275c---91799536843.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e7d3084c6---pavukajiwowivilo.pdf
    • http://personnelstrategies.net/userfiles/file/zavebikigujedipananafuj.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e693973b---42456085854.pdf
    • http://hurtowniagrafit.pl/userfiles/file/webofoje.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebc00a9205---75816899889.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/77be556ccf533e975251ffe47c5fcada/favopidifovi.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/ccecd0c3ffac20c3a812b73929f6da82/damikezib.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb9e718c74---xotexa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+work+a+blast+furnace+in+minecraft
    • 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_off0000e6a7.bin
74c9e265ab6c0dcbed3f1cdad81b39f8694402d1eff9d6baf4daa8f4725549e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 17628 bytes
font_01_sfnt_off000114cd.bin
0027764c4ce357e25daaab2e6dc6f5fb4894f140238d805b84c74d47208fd041
pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 10904 bytes
font_02_sfnt_off00012e1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1A 16792 bytes