Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc60466989fc94ad…

MALICIOUS

PDF

69.0 KB Created: 2020-12-02 06:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6491ed7d6851d6c909a85bd914bf4ccf SHA-1: d4cc7e0992ee6ba0a9fd74ab7c092ca9a80f5d9a SHA-256: dc60466989fc94ad444803897c4e5e62beb75a9f64354c8e74dd4759652a51bb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one pointing to 'trafficel.ru', suggesting a link farm or redirection to malicious content. The document body is heavily obfuscated and unreadable, but the presence of numerous external links and the overall heuristic firings point towards an attempt to manipulate search engine results or direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=celina+utilities+power+outage
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/9fd05a66f448.pdf
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/mepotu-lejugad.pdf
    • https://bitexaxa.weebly.com/uploads/1/3/4/4/134477172/rotugeked.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dumupa/dubrovnik_city_walls_guided_tour.pdf
    • https://s3.amazonaws.com/remeranexe/harley_saddlebag_liner_template.pdf
    • https://uploads.strikinglycdn.com/files/c8b6fbed-d204-4276-bfd5-e817a2d86dbd/lusosedadodora.pdf
    • https://uploads.strikinglycdn.com/files/6255c800-4fb7-43b5-ba09-9c1230096682/viasat_surfbeam_2_satellite_modem_ma.pdf
    • https://s3.amazonaws.com/muxozuvalubi/56213162431.pdf
    • https://uploads.strikinglycdn.com/files/bbeb25ad-630b-4d90-bee2-5063ae9aeaab/47338329206.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1da560d4671340079f70/1606229415813/15477135277.pdf
    • https://uploads.strikinglycdn.com/files/c27c06d6-7f6a-43d9-9c87-b76405c6b144/the_blue_fairy_in_tinkerbell.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d375.bin
930d162e9d5e37301bba5b98eb40e0b0156beb09b8511b011a43b2ca8214397e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD375 4984 bytes
font_01_sfnt_off0000e48c.bin
9aee5adb2d3984f7a02a0211e10262c0ef69e2a4f81a2b15dcb2e334d452f84e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE48C 10276 bytes