Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8029f0664ea77ae…

MALICIOUS

PDF

70.9 KB Created: 2021-02-18 05:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bda96de2407698f3cea7caa53370b30a SHA-1: bb7b215296c2472b0a10d24d6dde9d79e6ac3403 SHA-256: a8029f0664ea77ae028b1e8bb4b2772dcaa41392430dd872274efbadb99d17c8
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a phishing site, likely intended to lure users into downloading further malicious content or providing sensitive information. The document body, though heavily obfuscated, contains keywords related to a book title, suggesting a social engineering pretext.

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
  • 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://maypoin.ru/wix?keyword=conversations+with+god+book+2+pdf PDF link annotation
    • https://cdn.sqhk.co/bitaxukezor/fRhiDhf/37950971301.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/hZhljg6/93973852336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482623/normal_5fc72a170c1e8.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/5KNxHXN/zovodopugagef.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelotosa/ijeNgh1/94286546513.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/9jgePgi/space_engineers_how_to_use_workshop_skins.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/eggOgcL/nedisatepusumisek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5fd8958885cd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393759/normal_5ff78e564799b.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/2ac9Jrj/8188514021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fcd56497871a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luredavum.epizy.com/7325132770.pdfIn PDF document text
    • http://nokolul.epizy.com/miroremasowakiliwipela.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/essentials_of_understanding_abnormal_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/bearcat_scanner_frequency_guide.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_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 5664 bytes
SHA-256: 0d7baaad9d0480c92b32c2844acfdc421800fc9c947e854cbb14596fb784120b
font_01_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 14184 bytes
SHA-256: 9d9342aae15bfc7f89c306cdef2c83ca816332b218e05e51ed40c4f222101cac

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