Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e49a07768036c7…

MALICIOUS

PDF

71.8 KB Created: 2021-01-22 22:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 38961363febe9702e44bd3c6cee97d0c SHA-1: 95009b41af76e3b3d1bd124f4303bf6a462c5bf4 SHA-256: d9e49a07768036c78687905cc9f928bcd827403a093ac50f4bffc2f73a52ddca
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious phishing content. It contains an external URI and an SEO redirector link pointing to 'https://bologen.ru/123?utm_term=aces+and+eights+pdf', indicating a phishing lure for free downloads. No scripts were extracted, but the PDF structure and heuristics suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=aces+and+eights+pdf PDF link annotation
    • https://site-1173607.mozfiles.com/files/1173607/journeyman_sheet_metal_worker_resume.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/space_invaders_atari_2600_emulator.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/pizuvituxelik-zogususali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_6000617760f13.pdfIn PDF document text
    • https://site-1179485.mozfiles.com/files/1179485/67739276042.pdfIn PDF document text
    • https://site-1172757.mozfiles.com/files/1172757/razobupaveso.pdfIn PDF document text
    • https://site-1172901.mozfiles.com/files/1172901/70908693223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd155b16f486.pdfIn PDF document text
    • https://sufevibuxaka.weebly.com/uploads/1/3/2/7/132712301/jotafuwakevopep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447265/normal_5fce6b7d40308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_5fd2c66170813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393026/normal_5fcd9a79c491c.pdfIn PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/juwirejolu.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/e4iipea/woodshop_floor_plans_free.pdfIn PDF document text
    • https://site-1173894.mozfiles.com/files/1173894/11812644090.pdfIn PDF document text
    • https://damusabuweko.weebly.com/uploads/1/3/4/6/134609075/9a30a6394f0bd13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fc5e07e494af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 5280 bytes
SHA-256: 4b8cdbbb985a64c15ac5b9eb9c5aa72ac0daaed62d4fe797d45ebd9e84c7bd8f
font_01_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10872 bytes
SHA-256: b26bad80ff27075a57ada941191f51e2983d369d6884fe83c4a82265f83fe97b

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