Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57f6e49795dae05…

MALICIOUS

PDF

66.3 KB Created: 2020-12-22 06:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 933035adeb76a45c958222a21641c953 SHA-1: 7dbbcc0c83fdcc77168beb41b1012d651f7e8cb2 SHA-256: b57f6e49795dae05b12be00bbc05200eca34ce398109df2c6e55ab1267a8f1ac
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a URL with 'utm_term=pro+football+games+this+week' in the document body suggests a lure to attract users interested in sports, likely to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/strik?utm_term=pro+football+games+this+week PDF link annotation
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/luwanosajogesale.pdfIn PDF document text
    • https://lojedakefedo.weebly.com/uploads/1/3/4/7/134743006/1930274.pdfIn PDF document text
    • https://jezagegilefu.weebly.com/uploads/1/3/4/3/134307882/99f44.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/bobomovi_tepepajaparo.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/kizikowesomir_fevopedeneg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f8f1986e6987.pdfIn PDF document text
    • https://lejomibis.weebly.com/uploads/1/3/4/6/134657815/vapovalebu-rupinowefewute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5bb9b9698b02c7f41c617/t/5fce5e6d8a55f2188baa51fb/1607360115005/bubble_candy_free_game_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ab1b88c99b6d37c7dc09/t/5fccf851978da30c56ff3748/1607268434504/shooting_kingston_pa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc672d96b97992eb58188a1/t/5fcf664e556296156151e606/1607427663098/movies_2019_best_imdb.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_off0000c6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C2 5476 bytes
SHA-256: bee4a7e2f5bb335b9c31e0394fcfda8c981c6a94ab193f7f482b88dfb65b084a
font_01_sfnt_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 10664 bytes
SHA-256: 63e933ccd1f24c7d15faff2b949fb0e049945c1b39269b22db28a00755743e83

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