Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd05bb39adbf6c70…

MALICIOUS

PDF

66.2 KB Created: 2020-12-02 21:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: caff158e7ac08513068349bda06b2ff2 SHA-1: d7c8a3bdca60b4ba8e15ee34fe8d8d69fc8c2a13 SHA-256: fd05bb39adbf6c70e3bb404a308a1457b1d1a4c45faaf32e754f2cc7a4d53641
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-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://traffnew.ru/strik?utm_term=seguro+social+venezuela+cuenta+individual+cotizaciones PDF link annotation
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/suradux.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/majizenedixopo-zumow.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/2256009.pdfIn PDF document text
    • https://pemopexo.weebly.com/uploads/1/3/4/3/134305592/2939856.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/15a392d9312d.pdfIn PDF document text
    • https://solubowobadiwu.weebly.com/uploads/1/3/4/6/134642134/6786850.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/3215642.pdfIn PDF document text
    • https://xulajaxosu.weebly.com/uploads/1/3/4/3/134366267/tibafejazopizitibiw.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.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/lepefi/31472892578.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/unmet_need_scholarship_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06130bb-f3f7-4e80-9acb-bbf0eb6de99d/88317460577.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfbd368bfc5186167d33a/1606220762237/sajexinuleruvo.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/geziwuvukumugorojo.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/90832472405.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B7 5320 bytes
SHA-256: a7513b2ec505fb333982b7dce6e9ff5e7f1c31ecd457daadedba396c0fd4f68b
font_01_sfnt_off0000d8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 10624 bytes
SHA-256: 2258ad6a133ccc4479b7c02aec283f4eaf59db9a55a25fed47ace1841cf8d67b

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