Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a84c02d78589ce…

MALICIOUS

PDF

78.3 KB Created: 2021-01-12 14:37:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fd8112d3453877d0b297d77c8cc5646d SHA-1: e117b016c0b4b50c6f0250118a053b0206a269e6 SHA-256: 94a84c02d78589ce0d6bea78e8834a31563402f3690f32fcb64bb544e7600769
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://trafffe.ru/aws?utm_term=top+10+free+games++sites', indicates a potential lure related to free games. The document's structure and content suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://trafffe.ru/aws?utm_term=top+10+free+games++sites PDF link annotation
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/db222a29d1.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/sesuveloxu.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/8fbcd0.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/Iij3hal/slot_cars_tracks_melbourne.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/a538d.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/1SzErID/piano_beat_2020.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/texujoko-webudutasonorok.pdfIn PDF document text
    • https://betuvumog.weebly.com/uploads/1/3/1/1/131163564/386826.pdfIn PDF document text
    • https://site-1175227.mozfiles.com/files/1175227/vozawelexodasevevife.pdfIn PDF document text
    • https://latibexuwer.weebly.com/uploads/1/3/0/7/130776356/9fde867ab.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/gatup.pdfIn PDF document text
    • https://vajuwapokovis.weebly.com/uploads/1/3/4/3/134361820/6bd909414529c7.pdfIn PDF document text
    • https://niliwavinifof.weebly.com/uploads/1/3/4/6/134687551/a4dffe.pdfIn PDF document text
    • https://site-1168383.mozfiles.com/files/1168383/53967535307.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/datarofapakil/gitufovotika.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/human_body_parts_in_french.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_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 5332 bytes
SHA-256: 605b9a7b658756ad8fe0ec7864669b139a9315bd34e3685e852c3b9f796938a7
font_01_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 12740 bytes
SHA-256: cc179874fa5418fc16e89655a741bce40bec564c0c155303eafb15b6e5fdde9a

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