Malicious PDF — malware analysis report

Static analysis result for SHA-256 044a157da960125c…

MALICIOUS

PDF

123.7 KB Created: 2021-02-27 13:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d9a572c43aff3fb3abf2f2808f77900 SHA-1: b8a3959556c0d17c8e6ace7ce9db7d7f904aaaa6 SHA-256: 044a157da960125c115867a961fb19aae5893287f0da219348b569b51fb88b20
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 0.9999

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://jottigo.ru/strik?utm_term=audre+lorde+the+master%2527s+tools+book PDF link annotation
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/2400093.pdfIn PDF document text
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/5755201.pdfIn PDF document text
    • https://sogakuguw.weebly.com/uploads/1/3/1/4/131453515/sukomurifame.pdfIn PDF document text
    • https://sobidomigo.weebly.com/uploads/1/3/5/9/135960899/dapozisovegifo-bewof-jirola-suxododo.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/6229568.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/jazighj/fast_rescue_3d_save_humans.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/towutoginadivu/23432559899.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/quantitative_aptitude_questions_answers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/mla_format_works_cited_multiple_authors.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/26900135976.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/background_power_point_sejarah.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/answer_love_myself_lyrics_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/extended_essay_history_subject_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/23104095252.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_off0001a9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9F3 5292 bytes
SHA-256: 9a0c2fcb61a03a4bc3197c4adb5f34d34ff13220c12549fe8530eaaa4bed4f3b
font_01_sfnt_off0001bbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBC0 11364 bytes
SHA-256: bf685846fdbd9dc0f8c6b716a03f2a4babf2fdbf50a8d2055687546bb999a1b7

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