Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a1603fcda96f32…

MALICIOUS

PDF

54.6 KB Created: 2021-05-09 14:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7614c5ead3af356cfa2bc99ce3d86e24 SHA-1: b16ca60450bd80eaa9211f5d453faf33dfbbb950 SHA-256: d1a1603fcda96f32497741c132a7bc3c4d419b00c7760757f8feea66f24fb3ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7658

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/a055cd60b082e1971ed79a8e215a2d6c/lukegopupiredosafabakesa.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3dc38d581---vazelanovumojon.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607731ea313ae---norutufukoradinuvupores.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160903a2a9242c---telilame.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/b10i3j487dq94sds4u537gunrl/24573130501.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/236da3341144f247a21ef52b4656e591/22580778454.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc76077344---siliporarulipenarowix.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c6fee80569a2edf6c2944866c2ff8eb/juzokomodubebum.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcfbbd4d1---92386385984.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609463093b665---76116576220.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607804b7bcfad---24687010247.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3276b390---papibodulavawawu.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/ea21fbd4afa827744347ade45551673f/tadup.pdf
    • https://altonika.pro/files/fck/file/45275244331.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160970c4d158a4---tenozuvotifigemilel.pdf
    • http://www.annaleehuber.com/content_files/file/68319623170.pdf
    • https://batikatravels.com/userfiles/file/wufavavuwinilal.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mozilla+firefox+version+49.+0+2

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