Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68ce454639c47cf…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 10:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b7e9ede485594e626931da447a6db0d9 SHA-1: 19927040e44c1413a934b20d91691c5d09c51c37 SHA-256: b68ce454639c47cf163e902c9c88aaec9db4a28f764e542d45890f0f354a5873
164 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 attempt. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The document body is heavily obfuscated and unreadable, but the presence of multiple links to potentially compromised sites strongly suggests a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jp-cable.com/d/files/sunadovenudewufara.pdf In PDF document text
    • http://tantusmarina.com/UserFiles/file/ditajanubiki.pdfIn PDF document text
    • https://adci.vn/data/upload/file/44962208575.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/temaxesibul.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/1fecb9b8db74f320e4d1124b4350c4bd/33589987040.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c03330f9ef---jonaxeroxiji.pdfIn PDF document text
    • http://leton.pl/userfiles/file/30502761812.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/066e5720a380a497f1a25922b03111b5/luvirolujatizasi.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/37269318503.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/83310557531.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de80d6d4330---girifewavugegan.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/0to7b4ldmaqhe10pbttjo9c4jn/fovuka.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f439e04e15---vewipovegolelesekuporekot.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/begorezovimilazavugu.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/15711420448.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa59d802b8---38636442428.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/34176444150.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161227295027fd---60550270291.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/kakomubugona.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/59166090508.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae1058bc9c---pelazexi.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092d356058a9---48627008315.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/def7f0a17cb0cdf9c7297346e54ea9cc/xalepifeve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=intelligence+quotient+questions+and+answers+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 11080 bytes
SHA-256: 84c32ea105d10673400d1f5c467459edccb13237f4ccc25c61b6211e1e5e4060
font_01_sfnt_off0000f1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 17604 bytes
SHA-256: 6b8ebe48d4d4c786994900c9ececf7e124c41aa7f11bd5d83a7208742af60eb0
font_02_sfnt_off00011ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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