Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3049cdd04bbcc8…

MALICIOUS

PDF

74.2 KB Created: 2021-05-01 04:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a61ed3fcec95d6972c77ed57573f5a1c SHA-1: 085f58e14c5440f774649a46dad2577cd579ecdf SHA-256: de3049cdd04bbcc83becf91c5be90e4b365cac82d114c2134f130dd42077786d
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The PDF utilizes an image lure linked to an SEO redirector, specifically 'https://xezojetit.ru/strik?utm_term=sacred+marriage+author+gary+thomas', which is indicative of a phishing campaign aiming to trick users into downloading further malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly suggest it's part of a broader phishing or malware distribution scheme.

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://xezojetit.ru/strik?utm_term=sacred+marriage+author+gary+thomas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424036/normal_6018632226599.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/17931593151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_605675d5358bb.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/GbAlzij/classical_piano_pieces_in_c_major.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_602a248125553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_6012ac9a85896.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/3hNVzgh/nevorasudimosabuzaduboso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5fe91408251d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fe3e70f58661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_604f74507de50.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/xenuguzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_600ece61be88f.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/32080450903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_601145e7693fc.pdfIn PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/GIIKthe/32030215352.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/jfHShjP/14125394595.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/jixeremipet/android_emulator_yang_ringan_untuk_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/begedavofavakelagemamoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/why_is_my_nikon_coolpix_b500_not_turning_on.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_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 5524 bytes
SHA-256: 37e716eb552db2ee40629b00f39b510228e54d23f66f2b55bee308c5f0e1d037
font_01_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 10772 bytes
SHA-256: 51dd16a46e636f2028760923b03816e1960a4d24ad5b511444c995a6eb9cb8e3

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