Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c9046930897467…

MALICIOUS

PDF

83.0 KB Created: 2021-09-21 00:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6cac4064f3e2eb4e5ca383f5d87dce37 SHA-1: 49898cd8dcbf0b211dd255abeff1ed8e0cf12027 SHA-256: 56c904693089746726ebbf2a6916b4fde45a209526f18ff5f37239cae8e3ad7c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external PDF files hosted on various domains, many of which appear to be compromised or disposable. The document body, though heavily obfuscated, contains text that suggests a QR code lure, a common tactic for phishing or directing users to malicious sites. The presence of multiple PDF link farm heuristics indicates a deliberate effort to distribute links to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://businesslife.com/content/files/50460735220.pdf In PDF document text
    • http://trips-in.com/ckupload/files/fisidekozoboxesolurufel.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/godakirogikiwibawozitada.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/fubaninefemopuzav.pdfIn PDF document text
    • https://autoskola-scp.com/files/94212326183.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/92703367696.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/48680747357.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/65812493731.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/mujn564trdvu2ma9n8he7gp3g0/rutatof.pdfIn PDF document text
    • http://szcftz.com/upload/mesetipajukilige.pdfIn PDF document text
    • https://whitesal.com/data/images/file/2289_20210908143722.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/fiwadoruwijepapatetu.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2e80705e---wapuwetikebenogopodezej.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/94278830143.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/simutobofopus.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/3197088934.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/399f8c584f5d3a5f93d1e9269b8f73fe/41005775773.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/zabowibopipixalerupo.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614263a9a3e32---videgufugabigor.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/zuranorediludidololi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614703a3e4930---buzutesobipidipadivizuje.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/17162900247.pdfIn PDF document text
    • https://beaszemin.com/files/94378222506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=scan+qr+code+on+android+phonePDF 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_off0000dfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD8 10520 bytes
SHA-256: 6f71a2426b0b85652710b015806aaa4598f72aec4c5b8f57d7c223f4e44cbf28
font_01_sfnt_off0000f778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 18016 bytes
SHA-256: 813ac9497966a6bc527f40db3f63c6b98b9481ca16e519e2bc7955a260439527
font_02_sfnt_off0001260b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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