Malicious PDF — malware analysis report

Static analysis result for SHA-256 345e3b1b529a6d7f…

MALICIOUS

PDF

53.1 KB Created: 2021-06-23 01:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f6c1d57213f53e4068535dea5729fa27 SHA-1: 1d38fca9f74b4b9c0136b5ef7e646493f7ad4678 SHA-256: 345e3b1b529a6d7f547ddfb4910934e6f5dc723a1204ea8d640449963751a223
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS uploads, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded content appears to be obfuscated or corrupted, preventing a deeper analysis of its specific intent beyond being a malicious link aggregator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8959

Heuristics 5

  • 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
  • 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://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/32136788623.pdf In PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/52qoapmi255921f1f9lmu0lm2b/16413725595.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca573c13f5---71364690725.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/a48ea528a2fca912b439bcaf6538e284/63657083581.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/55165912392.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/q3e8aeucj5gaectg166td5n5b7/vevaruziwusome.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/laxupujikigefofuruxakifo.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/246e27713d1fc0ed606d1d4687e680c8/gojuze.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/rgvemmpmk0mnnsciifgklpgbha/55280544906.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/juwidafuj.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/gejowufugizutitofi.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7df345649---81842828254.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/87007789173.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ggotat30kk72irriv6qj8dpk6c/28033072703.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/39085706061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=westlife+i+have+a+dream+audioPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 5220 bytes
SHA-256: 6c8d07042544302f691dd6588813b6c3d95aedf0cbc9f39f8e90f9c2dc77a21f

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