Malicious PDF — malware analysis report

Static analysis result for SHA-256 43eacb11fe81dfdf…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 15:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6cac26a50012d1a2dd193052e20b202e SHA-1: dcfc7f76180c5baa26aec176fcc9c5e8c22fde55 SHA-256: 43eacb11fe81dfdf762270985899e96ec9a66db14e557c1bf66014c682e27a17
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious domains, indicating a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically a phishing or trojan payload. The document body, though heavily obfuscated, contains keywords related to a trophy guide, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://seumenha.ru/123?utm_term=until+dawn+rush+of+blood+trophy+guide PDF link annotation
    • https://xegadoponuxi.weebly.com/uploads/1/3/0/7/130775279/9797380.pdfIn PDF document text
    • http://mebel-albero.ru/2658619812nqpt4.pdfIn PDF document text
    • http://mavpa.fun/lista_de_verbos_irregulares_en_ingles_significadomlxcz.pdfIn PDF document text
    • http://lokotahas.ru/1601938044916iib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_604cdb7f9ca0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491445/normal_5fc56e08c062e.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/vivakilezoz_votunuwidew.pdfIn PDF document text
    • http://wwbook.org/electrical_engineering_technician_vs_electrical_engineer7he5m.pdfIn PDF document text
    • http://zeropium.com/sensory_details_examples_in_booksrb1cy.pdfIn PDF document text
    • http://prognoz-football.club/71410215505v68da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_5fdc2c12463f5.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/levipodu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fe53218e3069.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/lusabifef/53601944504.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/52927810348.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/48244818181.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/when_did_job_exist_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/16897650096.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/malasegamopukukipajixeraz.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/50090297647.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/48817002.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bokalereno.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_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 5628 bytes
SHA-256: 010506df45f1539af966c7500487144ee32242ec3d348cf3fe8d6bedcc1631a7
font_01_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 10148 bytes
SHA-256: 9e073a26ff2c9c4b3a6226c7774a423b1ddeec14071dbb7292f370264ff85378

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