Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e22b13399225c3…

MALICIOUS

PDF

67.5 KB Created: 2020-11-13 16:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a20adfbd46934b2e5069fbaf0628232 SHA-1: 29ecff95efbdc66d8b1f45c945633702df088da8 SHA-256: 19e22b13399225c30585cb6d473ca32356d1f0ae0b0fe06d9b14a8107e4917c6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, with one pointing to 'traffset.ru', suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF's primary purpose is to host numerous external links, likely for SEO manipulation or to redirect users to malicious sites. No scripts were extracted, but the presence of external links and the overall detection suggest a phishing or malware distribution attempt.

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://traffset.ru/aws?utm_term=bible+story+book+with+pictures+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f94f55af009d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fa1ea82a97e1.pdfIn PDF document text
    • https://lozatovetifeg.weebly.com/uploads/1/3/3/9/133999134/9512619.pdfIn PDF document text
    • https://bizalaso.weebly.com/uploads/1/3/4/4/134443832/komugidumaji-pagarowixobe.pdfIn PDF document text
    • https://marulokovew.weebly.com/uploads/1/3/4/6/134611896/15383.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/zizarep_vasizesamudire_legegezanoxi_galegudido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f90174a206a8.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/5014cfe.pdfIn PDF document text
    • https://jirewolekaza.weebly.com/uploads/1/3/4/3/134387643/045d9bf2.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/rufonali/96092327399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02733f1-a909-4385-9ba4-16473010edec/lukawozebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02cedf33-5d0d-45cc-ab79-a57a96f72d65/tuwunivozedalisixidijef.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/marijuana_seeds_for_sale_usa_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/korug.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA09 5480 bytes
SHA-256: 8a40fa6cc202d08678364a6da0fab0737f8b209f81bcead4801af683e781f3d4
font_01_sfnt_off0000dcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC3 10584 bytes
SHA-256: 58ac8a9b2267424e751f84df98fabb2ad3edc01ce0a55f77a68ff7f22a951ba5

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