Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c02dcdcfba31bb6…

MALICIOUS

PDF

76.8 KB Created: 2021-02-10 09:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 467ce9ef984d67611bb2a0242822762c SHA-1: 40849abdfc4bbe20daa2580fff8b0650bd1d0693 SHA-256: 2c02dcdcfba31bb6eb660cd0c51df6a64283860228d3021ceab88084be8093b9
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, identified as a "PDF link farm" heuristic. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=hydro+flask+target+audience PDF link annotation
    • http://trellos.fun/9025228375qz7c.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/6479289.pdfIn PDF document text
    • http://robolab.one/vampire_s_fall_origins_rpg_apk_hacknkluw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_6011ecce54801.pdfIn PDF document text
    • https://kadefevexenikoz.weebly.com/uploads/1/3/0/8/130813118/simifawedafoseren.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/1866189.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/punuba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505159/normal_5fc730b512051.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fde0801475fa.pdfIn PDF document text
    • http://huaweistoreukr.xyz/garage_sale_pricing_guide_luggagehj7st.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/jezaxojipevu/rengar_jungle_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/calligraphy_worksheets_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/afan_oromo_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/bagorevirofedipez.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/amazing_spider_man_2_ios_game.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/lagu_gratis_didi_kempot_kalung_emas.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_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 5316 bytes
SHA-256: a583db7234b34ab43cdf3db0cd0e1a64c9a004f53336170ca507e38fd8c441c6
font_01_sfnt_off0001028a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028A 10564 bytes
SHA-256: 3a9d8dc6bd54bb41eca4c61810d68e701f32ca99e89a11fda3cb318c6cbed5c4

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