Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01239ea2689eb90…

MALICIOUS

PDF

70.4 KB Created: 2021-01-26 00:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 58a4391093cdf235dd271a48f9b71970 SHA-1: 96f1e818ce8249f30f542226ca8b69d68eee8b67 SHA-256: e01239ea2689eb90a4859c3c7cb18a48d58dc3e1dc6e07ad3e101dcce164106f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm designed to manipulate search engine results. One of the primary external links, 'https://seumenha.ru/123?utm_term=october+31+2020+moon+phase', is suspicious and likely leads to a malicious site. The presence of PDF_SEO_LINK_FARM heuristic and numerous embedded URLs indicates a phishing or SEO manipulation attempt.

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://seumenha.ru/123?utm_term=october+31+2020+moon+phase PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481513/normal_5fe0020881220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_6008d2eba1fbe.pdfIn PDF document text
    • http://g2am2e.xyz/lavazuwjtaji.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/vidIyGm/the_diplomat_restaurant_monrovia_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/Ygfo6hg/brain_test_tricky_puzzles_level_38.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/ggHhcjb/midudokob.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/KhciEna/diamonds_of_the_night_review.pdfIn PDF document text
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/wukedimogefev-fubakan-vojikes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fc6b3c59e56a.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/jujadodedaruxix/ambala_railway_station_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/autobus_messina_catania_aeroporto_fontanarossa_orari.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/97084057579.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/zivog.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/marriage_contract_psa_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/zatewelubuderibevutepeb.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_off0000d57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 5800 bytes
SHA-256: 92dc15c3b3bc8a38eef2892ea020bc9bfdcb1a4bf94e652fda6907f6c82f19f4
font_01_sfnt_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 10512 bytes
SHA-256: 5f1c283fe9498d57e358dc573d0013517a42a3a6d1e1463ba4bb30043a8f2348

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