Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33905856dc35932…

MALICIOUS

PDF

68.3 KB Created: 2021-02-21 10:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1e027f36d59d59a8dcae375e5e2b43e8 SHA-1: 5a6f46c6903ad30ce5719a2476ffaa334199cc98 SHA-256: b33905856dc359321a65c9f1a6156ae2ce1c2206c12f39227f4dad6714ee96a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=liboff+richard+l.+introductory+quantum+mechanics+pdf PDF link annotation
    • https://sidedelozamuk.weebly.com/uploads/1/3/1/4/131482822/juvugujonazokejojat.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/d61477f6.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/lafakejulejajewa.pdfIn PDF document text
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/f68eaf02323.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/favatir.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/0d7e11b0e1.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/f2163.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/aPUhhje/musician_s_friend_corporate_office_phone_number.pdfIn PDF document text
    • https://minibimegoviw.weebly.com/uploads/1/3/4/3/134333268/3b4d1.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/dfdb0f905c30f.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/jorokipolome_xigopakek_mijana_bipuzopiriloj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevelel/dunoraji.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/archero_mod_apk_unlimited_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/gupubizewijivege.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/82881948711.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/bcftools_0._1._19.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/51667586415.pdfIn PDF document text
    • 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://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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA67 5736 bytes
SHA-256: ea20298ddeeaee6625f3907cda57f6979c4e9f9316a648e29feb94c4b3c58111
font_01_sfnt_off0000ddc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 10508 bytes
SHA-256: 0e9f5f8981f2c8a9f666552784094fb8fa032f2eb74f75f008aee26273e51476

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