Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01b9af4117870d0…

MALICIOUS

PDF

66.4 KB Created: 2020-11-09 23:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d3356f6555cac97894ae2518ab2d8973 SHA-1: f38ac958c5b749b269d5fe345b5a01c2c13cc6ab SHA-256: b01b9af4117870d014c7e64f2dc8c4d440feb3f23132580e2c4a935b55a25df9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?keyword=free+cause+and+effect+worksheets+for+kids PDF link annotation
    • https://mixekolasum.weebly.com/uploads/1/3/4/3/134388380/zukozeti-neboniseganuz-xusok.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/7846894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f953c7d5a86a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f93adc19cf0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443814/normal_5fa8bc9d8b347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8da112e9364.pdfIn PDF document text
    • https://jevalibiku.weebly.com/uploads/1/3/4/2/134266190/8ded54b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5f95e80a11985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad319e7f-1af4-4bd5-8366-274333dcb3e5/18671203200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b4cb2c-9005-482e-b851-7c5ab784ced2/the_absolutely_true_diary_of_a_part-time_indian_summary_chapter_4.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/meeting_the_universe_halfway_quantum_physics_and_the_entanglement_of_matter.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/8175031717.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_off0000c74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74E 5188 bytes
SHA-256: 4ec571591e2ea962419b144fba63d6b567a32ccb53bece9bbd39fb9107be4bcc
font_01_sfnt_off0000d906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD906 10604 bytes
SHA-256: a2f69469dbfc707b9131d5c9b7dcbc24098d1bb320cb562f02d234789923d1dc