Malicious PDF — malware analysis report

Static analysis result for SHA-256 44278110129bc15e…

MALICIOUS

PDF

66.0 KB Created: 2020-12-24 04:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bd8e03fcc2b9c840c420992bab537b38 SHA-1: 155a81d1f6204597757c38182e63d4b94381c607 SHA-256: 44278110129bc15e6a218931cad7e9f29d97f37321e524053fa20c25d2d13549
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=strange+case+the+alchemist+hints In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fd662f5d48a4.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/gexgcjd/super_discount_pharmacy_plant_city.pdfIn PDF document text
    • https://kasugokadudibuk.weebly.com/uploads/1/3/4/7/134740653/b4aaa3cd3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fbc025f0bd06.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/taxadifupesafutom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_5fbc81c2bfb56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_5fb81d5fcccbc.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/jahgcet/save_our_planet_vans_high_tops.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417805/normal_5fc9cc4e73e53.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/rolefosiju/brand_identity_guideline_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/customs_clearance_information.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/badger_hole_fire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE4 3004 bytes
SHA-256: 429362817ea1b6bac5bdc4b831aae1ad99575570c0ba74a5a8cf55fa98c3763e
font_01_sfnt_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 5316 bytes
SHA-256: 144edcf80c57585941fc47f41d128e66faae01ff2f260d44b351f46aa86ff98a
font_02_sfnt_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 10140 bytes
SHA-256: c469c9406b8e5dd3befaf23d8f0ed5326dd8ab1e41afbe49d67574e49f52b34f

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