Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a525b3a53e3b36…

MALICIOUS

PDF

70.9 KB Created: 2021-03-04 02:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0b7dac702b83c0f11f0d6257389c5951 SHA-1: 36af8ad179237c74b787d53b476f4a29b1b1c137 SHA-256: 49a525b3a53e3b36e73de6fd67e9ca35d79fb8ad0a83a92e9fff3fdbf310fffd
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs that redirect to a domain associated with malicious activity, specifically targeting users searching for driver installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of redirector links and the overall heuristic firings point to a phishing lure designed to trick users into downloading unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=install+hp+laserjet+1012+on+windows+10 In PDF document text
    • http://excschool.ru/exercices_sur_les_connecteurs_logiques_avec_corrigs_ce2y9hbj.pdfIn PDF document text
    • http://freefire-gifts.com/38844496354x9fvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366978/normal_600744a5d29e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411489/normal_5ff7fbac45f06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_600110d772f14.pdfIn PDF document text
    • http://shtampshop.ru/23961597173dz0wj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423453/normal_600236fedfa2f.pdfIn PDF document text
    • http://opssmall.space/65455580129tk4iq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447263/normal_5ff7597754a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_60262c7a62d7d.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/excel_formula_multiply_2_cellsbgwfu.pdfIn PDF document text
    • http://jajosez.iblogger.org/pokemon_battle_arena_game_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowetuxamu.rf.gd/singer_6212c_bobbin_tension.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/workouts_for_beginners.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 5480 bytes
SHA-256: 841adf3c3beebd0801fe5038c8fdb12564678a41c4450d3794a4b1c70ceb1c0c
font_01_sfnt_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 10984 bytes
SHA-256: 21333691f894cabcce2556a77b502a6e6a252cf38e88f9fb8d1679a4015ee44e

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