Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e007bbad64db492…

MALICIOUS

PDF

76.4 KB Created: 2021-09-01 10:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b38ef9e3fbdfe23bfdaa5262cef8e058 SHA-1: 81dbd64f87ef55ff20596b8125e9acc0d8b6d220 SHA-256: 2e007bbad64db492dcc99f8fabdd572ef21ca45a295d9678f533eb10d64e5aa5
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 it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://irlanc.ru/uplcv?utm_term=yes+you+are+beautiful+quotes PDF link annotation
    • http://radio-salsa.com/php/rs/filesupload/file/84573190126.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b217816d6---devimaxapogonilusamu.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/q429ddfci1kijlgiakntsrj806/30053009765.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/670sp8v6kpib1uukd0hu3mtleo/31995642369.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d1ea63a66aeed96d7d1b65cb19b6990b/4504003839.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/livikativugemeda.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/77940643e4eb35e3187818e471bc558d/38396010653.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/40813247758.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103ee4bb8c8d---90574951234.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/giwiposugipelita.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/ninonivaganazi.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/zesanopiguwelepojegud.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/35503015030.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/29041293056.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/kuxurojibileninoduperofu.pdfIn PDF document text
    • http://synowka.pl/galeria/file/devoweniziko.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/78472315544.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/9r86821rjipjlthjptkpb40qc1/lajoribifawujuwomibaru.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/36184433123.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b16de213a91---tudibovesubuxunap.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/ruselasosagugipoku.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/fisikiwezagoxufesux.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/2c214b9da3ecbe24f283281da64f776f/13762689549.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b590c72d3d---buluganetozofufop.pdfIn PDF document text
    • 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_off0000c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 17296 bytes
SHA-256: f779765d322a2b59980f0f07d8aebab35b972105fe21fd95558439c680e1654c
font_02_sfnt_off00010b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B09 10588 bytes
SHA-256: 5b5f6c7e55179c825e654b8255375aa8596711b7110473d57cd032f78f957ea9

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