Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d602b9f335d3bc…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 05:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3a682262977fb15fa85b7fcaa560249f SHA-1: 62398390954d939a0df0c23d39da207d2edef590 SHA-256: c9d602b9f335d3bcca8dd521247df51637f848e49987212006c3c1cdc440f47b
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous external links, many of which point to SEO-optimized content farms or potential phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a large number of external links suggests an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=indian+air+force+non+officer+ranks PDF link annotation
    • https://cdn.sqhk.co/vakanaju/jcYgghf/my_girlfriend_talking_to_other_guys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_600097821475e.pdfIn PDF document text
    • https://dasewukux.weebly.com/uploads/1/3/5/9/135956745/4386654.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/godow.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ghgjhfT/33023190491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_601ef3dc36ceb.pdfIn PDF document text
    • https://cdn.sqhk.co/beluvano/id4zjfH/vmc_machine_programming_operating_videos_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5ffa075cde915.pdfIn PDF document text
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/nidasixu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_600635e574de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_602ae0c8214b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poweradufuxi.epizy.com/desefukokazi.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/psp_games_emulator_guide_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/xanib.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/kenizi.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/doppler_waveforms_radiology.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/chammak_challo_dj_nyk_songs.pdfIn PDF document text
    • http://towilisok.epizy.com/soxoxuler.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_off0000e18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 4984 bytes
SHA-256: a9d9baed0e4704d2b408704d24e99d7860b68a7ccd503fc8080c16e373f9ea5c
font_01_sfnt_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 10884 bytes
SHA-256: e15d3839286cf392d18757f8e62c42bcc5ce49c9a74e8ac08c3427e8ecd3d1be

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