Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19deb292ad92455…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 11:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2bab8d4720ff2277fcf93912ddaa22e0 SHA-1: dfa0aa73590b74a297a5c9f725127c734d1deb90 SHA-256: b19deb292ad92455d40ac7b22367a9ae41517ca4fab6b089b60819af59baed38
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary URL suggests a phishing or SEO manipulation tactic, aiming to trick users into visiting potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://lozipotod.ru/award?keyword=is+apple+pencil+compatible+with+ipad+mini+5 PDF link annotation
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/413d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_602bb1ece62e4.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/zomusowawexewul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_5ffe865120903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_603362d306fe8.pdfIn PDF document text
    • http://sowizibusi.22web.org/is_the_witcher_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_5fd661ab8eb26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_60333f0968d67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415930/normal_5fe35cc719839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_601704155b7c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagopemolal.rf.gd/24074942019.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/72747862346.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/zowemevixaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/veduliwusoluperad.pdfIn PDF document text
    • http://jokipuzovorije.epizy.com/62360436181.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/spotify_can_t_songs_android.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_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 5508 bytes
SHA-256: 5129492eac9da2f4f5af8edc55d9ab60eafc2ac4fb2c5f31f3da26ab284193cd
font_01_sfnt_off00010e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 10868 bytes
SHA-256: 9db6c8eefa9980c94c0530689e2ebd993a9ca5f67c0fc993a8d6fbb2cc7b34bd

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