Malicious PDF — malware analysis report

Static analysis result for SHA-256 05419a5b8614d55d…

MALICIOUS

PDF

76.6 KB Created: 2021-02-08 12:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c1f52827a12e8eaff430b809e95864bf SHA-1: d29ec85c2ef9e3785e8faf1d32d4ed2de726586a SHA-256: 05419a5b8614d55d7a5159261b772b83b001d44cf1e5cdf100782b16921c0d06
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically designed to lure users into downloading potentially unwanted software or malware. The heuristic firings indicate the presence of malicious redirector links and a high ML score, strongly suggesting a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs point towards a social engineering tactic to trick users into clicking malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=gta+5+apk+ios+pc+download In PDF document text
    • https://cdn.sqhk.co/lewulula/cAdjfzy/setakexosoletirufibarikip.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/0jjsVdt/battery_powered_lights_with_timer.pdfIn PDF document text
    • https://cdn.sqhk.co/zotiperugi/jfLFc1v/captions_for_instagram_2020_quarantine.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/Rhc0Rgf/road_racing_bikes_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/ihcFW0O/dirt_bikes_road_legal_125cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_600e4552e8af6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5fc68df39deb1.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/ohe0ayp/sonic_dash_2_sonic_boom_all_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hh9gc5X/118125876.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/prDWNhi/wulapitebozofis.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/etnGWhc/gadebupasononok.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/hSgjEWC/short_stories_in_english_free.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/ifghgjY/lelijota.pdfIn PDF document text
    • http://instapodarok.site/aashayein_lyrics_song3wtl0.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/tokafanawa/more_synonym_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/juvebulorejip.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/cdc_gonorrhea_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/27305102934.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 6

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_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 5280 bytes
SHA-256: 68a89ef9d6a6ae5c49c7eed660a3784026da52dac375bc44957f2b8c19976794
font_01_sfnt_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 10020 bytes
SHA-256: 2feb777e8a6946b6328ecd50f89b2abd9652d3850504ad4b38a0760a191a31e9

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