Malicious PDF — malware analysis report

Static analysis result for SHA-256 a750abc70d859fc0…

MALICIOUS

PDF

74.3 KB Created: 2021-01-10 11:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8c85d830de0594903b9ba0067a344a34 SHA-1: 6677c42b86c08042831dde9b99b94adc2b96a0b1 SHA-256: a750abc70d859fc0d99c7894b5f88805bdc27909d42a09108b6a5a90e99a7769
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 heuristics indicating it links to known malicious redirector infrastructure, specifically disguised as a search result for 'Bandini serial last episode'. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the redirector URL, which likely leads to a phishing or malware distribution site.

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://traffmen.ru/aws?utm_term=bandini+serial+last+episode In PDF document text
    • https://site-1180277.mozfiles.com/files/1180277/auto_top_up_reef_tank.pdfIn PDF document text
    • https://site-1176681.mozfiles.com/files/1176681/79813680771.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/j6jYhfm/rocket_music_player_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/jbicIge/dalerorivesuzeg.pdfIn PDF document text
    • https://site-1194286.mozfiles.com/files/1194286/mutazakabajamugev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe392b772b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8742bd101f1.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/jenagubadopi/5210728364.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/jiweziberubulenitigit.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/5th_wave_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/lab_safety_cartoon_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/75263614664.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_off0000e771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 5004 bytes
SHA-256: f53bc788d5d4b3e06417262261b9176c0da83fe287eae341c86212cd582cf3fe
font_01_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 10508 bytes
SHA-256: f5212cdef24c19c90537252511d2985f89020e3e6df23462d7bc02f194b996be

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