Malicious PDF — malware analysis report

Static analysis result for SHA-256 e877ce7990192596…

MALICIOUS

PDF

68.2 KB Created: 2021-02-14 05:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6b0efaa3c79f1e2e10cb134c714bcb0d SHA-1: a1e9c1a81d22b92319abf03b362b721d6d31a45c SHA-256: e877ce7990192596a0e82a86e574e3a0a6fdbf55d8cf82d5b227b893d6428b3c
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://baarspo.ru/123?utm_term=the+gravity+of+the+situation+worksheet+answers PDF link annotation
    • http://natur-green.fun/xanidigowwwc9t.pdfIn PDF document text
    • https://kamukijupekud.weebly.com/uploads/1/3/3/9/133997827/5450372.pdfIn PDF document text
    • https://lelidejob.weebly.com/uploads/1/3/4/6/134643066/lekidowebuveg.pdfIn PDF document text
    • https://fazotevepokok.weebly.com/uploads/1/3/4/8/134865813/4601139.pdfIn PDF document text
    • https://limopepubev.weebly.com/uploads/1/3/4/6/134627214/dudikot-wasaxaxokijowu-pitemugagil-vupakafuse.pdfIn PDF document text
    • https://panesiwosejel.weebly.com/uploads/1/3/0/7/130739396/6349753.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/wukevirenesu/56658407703.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/bangla_video_gane_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/kojosepesiretijesuxex.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/prominent_dulcometer_chlorine_analyzer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/secret_love_affair_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/apa_research_paper_outline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/flygt_guide_rail_bracket.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/destiny_scourge_of_the_past_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/rezomep.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/49425355466.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/dfeh-_188_cfra_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/95016968059.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/35071388961.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_off0000cca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA7 5264 bytes
SHA-256: 113b4119fb8d6ca1aaa5eae7a807f9fc302ce526a6f4b789da41132a2f53b689
font_01_sfnt_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 10840 bytes
SHA-256: 5a0b4a16e82d2ac03ca150f4eec0839f42b97dfd165ada08817a43f7ff8e5214

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