Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ac46ea4a9287d0…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 20:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3fd3fb6e29bc822cf37b01e5e77ffef5 SHA-1: a042fc6c02b8cd58db628ddca7a786340d443ee0 SHA-256: 26ac46ea4a9287d01b65a7f2ba5b2113c94ca8982b983b8f30eb9986d6691ab3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many links pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The document's structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/61213713890.pdf In PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/85883549815.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/7370212854.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142b91233f67---gewete.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/2351123010.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/walisaxonogufovaz.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/zudotuwamenizaferoj.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/734b3565cd156b4b132e9126e79e06af/33903432868.pdfIn PDF document text
    • http://marupi.de/UserFiles/File/keteluxuwutinabisajesem.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/suvuposemijamulunorati.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425f9c4a1b1---zimiterubedeti.pdfIn PDF document text
    • http://sakem.org/userfiles/files/60983296652.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/befajogapojexenagiresije.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///63201541047.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/9731335377.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614139fc1e2c3---mizuwunixepexibetivawuxub.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b8e56ea46---nututimebejepafipumewexa.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16134901cc8d6f---83593752901.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/70105784960.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/vipolopomasi.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469c29d5888---buxuxipabulidimovag.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/29676999257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+convert+to+pcPDF 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_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 18904 bytes
SHA-256: c0b6debe2788c5bce90517c8b4a85fd1a916b91b7b92ab34332e9b20bc8a3de1
font_01_sfnt_off00010ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001270d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 10176 bytes
SHA-256: 066881a8b810b7500d8411e538a1f4b70414550a6498b9e519d9b5c829211ea5

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