Malicious PDF — malware analysis report

Static analysis result for SHA-256 56aa323c9b39edc6…

MALICIOUS

PDF

68.0 KB Created: 2020-11-25 09:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 06a5b337bf79cc9b4faf3e9775671e48 SHA-1: 430ef895a11bf3955a37b0724a4a7a5b3aae3dc6 SHA-256: 56aa323c9b39edc6168aeea0af5db18ff80222b5e6b82f930442f07927c6d1ef
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=deadpool+2+theme+song+ashes PDF link annotation
    • https://gepopoxano.weebly.com/uploads/1/3/4/6/134663556/b1008d68.pdfIn PDF document text
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/cf254866fdfb1f9.pdfIn PDF document text
    • https://mamonesobekemi.weebly.com/uploads/1/3/4/3/134320903/2731873.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/nixuj.pdfIn PDF document text
    • https://fetibafavi.weebly.com/uploads/1/3/0/7/130776688/fulog.pdfIn PDF document text
    • https://gufubavofunopi.weebly.com/uploads/1/3/4/7/134704705/tiran.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/c898c.pdfIn PDF document text
    • https://sidunaxegizu.weebly.com/uploads/1/3/0/7/130776644/3460834.pdfIn PDF document text
    • https://duxuborokepab.weebly.com/uploads/1/3/4/4/134449965/6173330.pdfIn PDF document text
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/gigojigegefadi.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/daraniwekamidir/online_aadhar_card_password_remover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1772245-cf86-4c70-afa5-93bff5d5f8b6/96851541474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ecf378-f996-45ee-a662-25bc01ca347b/dog_house_air_conditioner_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/ift_2020_virtual.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_off0000ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 5408 bytes
SHA-256: 098e170bc23b476c8f4dd62e36f1b493afb2f78091da036e7d10f4c684e38b57
font_01_sfnt_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 10312 bytes
SHA-256: d218a5a0920d03c8796b3d9ab22db1ef1c33bd49ddc8381cde09f09d0a51874f

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