Malicious PDF — malware analysis report

Static analysis result for SHA-256 095bacf0dfb188f0…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 23:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 449d276dda595b064fbfa1c6ca0ed5fe SHA-1: ff0b1aef2436001f005be265040da8e961d6128f SHA-256: 095bacf0dfb188f01dec109d733c2765f0aa49e9ecdfafcacce34a1c149c37c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm hosted on compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. Although no scripts were directly extracted, the nature of the link farm and the detection results point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dc263c2c50b---nirabifepene.pdf In PDF document text
    • https://nusantarabet4d1.com/contents//files/wesosenabadamifegab.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a467a57e3---gowiwinewibebexibawud.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/4e38ae323a36fcfd891c40af10cfd676/jupoxerawogekoruga.pdfIn PDF document text
    • http://egca.fr/userfiles/file/65102229813.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/39136308529.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/62124709947.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a2506680e---46259997957.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/0hi5kicdsva6srcca5416ja68g/wuwoxabekirodiw.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1bcaacfe---18956361327.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/92112582902.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/ditekowewebotijun.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3b4b7ff949810995b1013f3cf5416039/dedalemoguliwamezos.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/65742258925.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/kuvafewivaru.pdfIn PDF document text
    • http://areaarchitetti.com/userfiles/files/tifutuvedit.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a544c9a975---jutisikobomuwovepetaviko.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/58324096518.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/86317555398.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/gakizibowaxosogow.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/82140365990.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/50080622137.pdfIn PDF document text
    • https://btegypt.com/file/vabajekojutosexosad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=old+shale+knitting+pattern+variationsPDF 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_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 10856 bytes
SHA-256: 4c307e2fefd840290286c19d391be124aeec0a43e20cf6a68bbf3fc68be41783
font_02_sfnt_off0001167f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167F 17072 bytes
SHA-256: 13b4941a630c72c62c6ea0a138887438a903722233bddb917def1b13917bfe36

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