Malicious PDF — malware analysis report

Static analysis result for SHA-256 347f6ee69f73ed01…

MALICIOUS

PDF

79.7 KB Created: 2021-06-29 03:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8593155fbadd6c1d51dd14c5eb33742d SHA-1: 2c4f1fc2ff79a34f72bb19bc08e92be06fca746a SHA-256: 347f6ee69f73ed01cc494a11c685f688207097cc799cf869a638c2710e7f2d68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites or disposable domains. The primary purpose appears to be redirecting users to malicious content, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://oniceh.ru/uplcv?utm_term=cleft+connecting+nose+and+mouth PDF link annotation
    • http://taxilitomerice.cz/ckfinder/userfiles/files/72444416665.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe152c285e---48237554843.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16089215034507---18666314894.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/d97ab42fde373b39c0ce8ad2c93622c8/zomupuwomugonibuzo.pdfIn PDF document text
    • https://actorconseil.com/files/file/jeravavixoxebotudawofewa.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/0ccb5a4d9e134fade308a667eb327a9a/28149431089.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/59055647078.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/54202137975.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095eb7773ef6---bovubavunajifej.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/epq02tqf2imhg463a3kvhqlnb3/vagosurupasa.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/n8ik5bfr348d0m2jdqnl2bopb2/lirivululumezijunufojixid.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/xasabibamerijogeza.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/66780992127.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/d344b4aca10ce3ca612b9c09503b95f9/18863050325.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/taviwi.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8df148632f282774f8f33a47c5027343/wotazowubavasomobarosiza.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//6601032627.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/eql5q2i0lv334m5p9ck0p2m1o7/48972006494.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c25e24ac2---bezujavifovenujumawe.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b28e303e6bd---29372749551.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/xebejijozepenaviwapo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f7273a7e7---wodaruwid.pdfIn PDF document text
    • https://mfdesign.hu/files/file/62289771272.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd918284ba---19662061904.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_off0000d22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 10956 bytes
SHA-256: 96ef5ab854bbe965ebeabbb118c7ed71213066c0ed4ca10450b0d367223e3743
font_01_sfnt_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 17540 bytes
SHA-256: 04744e6dd8b39437a875f14e84c4a3b65046d2c0da77b1bff28d7d9a2666932a
font_02_sfnt_off00011962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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