Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62a77e53bf7d86d…

MALICIOUS

PDF

65.8 KB Created: 2020-11-25 21:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 250cbb6537c9e4ea1b438b8b4da97a55 SHA-1: 062380f4c95c37c8ad435bc1a724e68af8142b88 SHA-256: b62a77e53bf7d86d6b6d77402a62dfd0fe33c1d6e8c3e7ec2dcd3da519eb0725
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://trafficel.ru/aws?utm_term=android+repair+shop+near+me PDF link annotation
    • https://sowosevutab.weebly.com/uploads/1/3/4/3/134311467/e34f9e1cedb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5f9a135635816.pdfIn PDF document text
    • https://jajewivazag.weebly.com/uploads/1/3/4/4/134491582/galok-mamewomaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5f953e2bbd246.pdfIn PDF document text
    • https://midomiwu.weebly.com/uploads/1/3/4/5/134592630/vuromaka-fidatujot-siwuzis-lojeri.pdfIn PDF document text
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/7073514.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/zifozamuve.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/e1147172-0b28-4bb4-92b5-1152fb697713/wivugeru.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/supreme_court_judgement_on_cauvery_issue.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/belden_8760_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/ascii_and_unicode_table.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/vb_knowledge_matters_sports_and_entertainment_answers.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_off0000c698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC698 5156 bytes
SHA-256: b7ab2083da3895187d52957f5cd12aa33a2a6fba5235ef114d75176eea3aae2b
font_01_sfnt_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 10196 bytes
SHA-256: 833543c761ce723e243627c1e0c3580d69fb243a2e9360d64d7b70e5af845cdc