Malicious PDF — malware analysis report

Static analysis result for SHA-256 650681639e1baa28…

MALICIOUS

PDF

88.8 KB Created: 2021-03-01 17:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6a2abf754c808d45c1d4f6fcfef589fd SHA-1: 5d57a44a3787c12bcd88380107e5f622e9c45504 SHA-256: 650681639e1baa286b7cbbc1a83c6c00205bf4fe3fa4d81d7cf167ddca21abd2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=life+fitness+x5i+elliptical+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448980/normal_5fdc1df86c0bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_60225ddfb967f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380405/normal_5fcedb07733ad.pdfIn PDF document text
    • http://bubble1.space/epson_v370_review_negativess8cup.pdfIn PDF document text
    • http://familyit.pro/bigadaretixaponarqskm.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/bawimapegumexid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ffc851115a71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5ffe492c1f42d.pdfIn PDF document text
    • http://kyponnik.online/sample_inventory_stock_status_report2r6lq.pdfIn PDF document text
    • https://wufovepujiz.weebly.com/uploads/1/3/0/7/130775368/regufamakixuma-dasos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421640/normal_5ff8c66735665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_6024c19fcbf88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_5fdefcc41c781.pdfIn PDF document text
    • http://goodsfor.life/healing_the_inner_child_bookfrv5d.pdfIn PDF document text
    • http://persequenteamsohbet.com/91613912617m7xqv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_600b1a5dd4fc5.pdfIn PDF document text
    • http://gromstroy.com/mupepotobiwetosituvwlq9.pdfIn PDF document text
    • http://aduo5.online/tevirafoxesujuvizalogidufrsue.pdfIn PDF document text
    • http://fishing-rods2.club/50424579629s252y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0F 5196 bytes
SHA-256: 2df6713915483bd7737b083afb575ad250e1fe60655cda4c85bf6602ace1b316
font_01_sfnt_off000130c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C6 10856 bytes
SHA-256: 1eeff78711255fd9d041520c9af3deba7825df9540076db2c86905a8aa8c2410

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