Malicious PDF — malware analysis report

Static analysis result for SHA-256 15172896d84c18b6…

MALICIOUS

PDF

87.3 KB Created: 2020-12-16 13:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8e132783616d51a0b015b531d3f7e545 SHA-1: e70d61fc902b21a0fa87afb0baf116633371b23f SHA-256: 15172896d84c18b6b624aaa568246ee0fd0f29f187c10d7b0e4f3b0619775995
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The presence of numerous external links suggests an attempt at SEO manipulation or a link farm, potentially leading users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=the+enemy+series+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fbf051bb4ca2.pdfIn PDF document text
    • https://jemijibiwozigep.weebly.com/uploads/1/3/4/8/134855884/7301735.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/ae1c548ebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5fb337e991a15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5fad680e5e213.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/5222f43f-aec6-420b-9939-3987946a52c8/wubafatas.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/66185592581.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/gepemojawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317fe0d7-74fd-4413-85da-dbc72fb2cf34/toyota_forklift_7fgu25_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86ce2ca-a918-4dd0-a9a5-21875a5cca52/xojixalor.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/satajog.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/experience_certificate_format_for_quality_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/baby_donald_and_daisy_duck_coloring_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d09d80-288a-4155-8ccf-1f337eb0fe90/pitaxejijepenawivonujatit.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/taxotisesukasaxonamig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f6ada6-26fe-44b5-ae05-be49dc1b5825/58326577837.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/soul_ties_book.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_off00011a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0D 4944 bytes
SHA-256: 44de9b0e5fa2c65c23532d334b32ea199f2af4412ebfadfb4cb7965606e33f1b
font_01_sfnt_off00012ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB3 10968 bytes
SHA-256: 838aa1f93ad08f1da54eb18493582aa72bed47697e9cd9cfa33f48ac54acfa6f

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