Malicious PDF — malware analysis report

Static analysis result for SHA-256 266c7fccee79e4dc…

MALICIOUS

PDF

96.5 KB Created: 2021-07-26 02:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 332ed0bfa87e740907a5b8f006e717b3 SHA-1: 1f4682ad1fc824e6026ac30d6500c07a899d10fd SHA-256: 266c7fccee79e4dc5f220385e3ecc17d3970a8dd58d5cfab6d44090a50db6025
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://stcc-sa.com/motakamel/Ups/files/41221135791.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f51e02e0ae9---85363804657.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee888d72eee---barila.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/90002737155.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/jukamirujawipedirufowow.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/4955897780.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/16816567925.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/68647643788.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/15747124529.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/75466990098.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/c36f651ols6vk649qqibe95acp/27503508176.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/17279206307.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/ronadevilevum.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8c0fad326---xotukaxukagirevixozalolox.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/manovobulumebolojune.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/6472db1e842723d1ef1055dc06f5c597/pedigasiguzisujawimovo.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/2179750343.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a33657deb1f07494dc56bd58e931a412/lipelipogarexezeronomo.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4dfb1c976---namipug.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/netolidemilufidafanedon.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/gotudizawajiwalelo.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbd55a12c6---91844741987.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/bajivegalumunodegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=hesi+exit+exam+score+rangePDF 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_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 18108 bytes
SHA-256: 3b991695011269b3a1a31027e8b031d2385735c0dca03046eaf0fcf1d25ab658
font_01_sfnt_off000142e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E6 10620 bytes
SHA-256: 0f391fbebdb17f7bd48922e9f56ec342f39d6830da97a44ea75af753f92d5659
font_02_sfnt_off00015b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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