Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe93a9c1f31d88ac…

MALICIOUS

PDF

84.0 KB Created: 2021-01-15 22:00:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6bf96fcd1bdcddb124eb4b2d0dfbb068 SHA-1: 009dd1366381be7d21deb4baee2dbfd3fc580879 SHA-256: fe93a9c1f31d88acc46496d6a4cedab286f53334655ee31d68d643c2eca11dfb
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains, indicating a likely phishing or redirection campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the nature of the embedded links and the heuristic firings point towards a malicious document designed to lead users to harmful content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=sword+crown+unspeakable+power+pdf In PDF document text
    • https://cdn.sqhk.co/jefapukawore/hdhih91/80068190934.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/watigev.pdfIn PDF document text
    • https://site-1178370.mozfiles.com/files/1178370/zilixakel.pdfIn PDF document text
    • https://site-1168114.mozfiles.com/files/1168114/twin_pregnancy_week_by_week_symptoms.pdfIn PDF document text
    • https://javimitama.weebly.com/uploads/1/3/4/3/134349319/1e68743caefb8.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/d89ac5aee.pdfIn PDF document text
    • https://site-1171384.mozfiles.com/files/1171384/73550324302.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/fisota.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/dvifjhw/balling_gun_for_goats.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/jewizopukuni/amazon_prime_video_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/script_for_guided_meditation_on_gratitude.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_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 5548 bytes
SHA-256: 41bf86901b7c11dfef5953e345ab1e757ece91ec29d827d537d3f9bb78f695c2
font_01_sfnt_off00011ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFE 10380 bytes
SHA-256: bb694f70a4151dc94ee86cf8082ad935befb37d20e78768c3f79626e38a7c8b3

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