Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb8ef0dd37ef165…

MALICIOUS

PDF

77.6 KB Created: 2021-02-27 07:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5af465746b3a78a4a1a35858dbc1fbdf SHA-1: 76c879acefc35c82de68ea3dd5cbfb51b43976aa SHA-256: feb8ef0dd37ef1656b157882177b95df6e84c8eb19144b6544fe8eec7ee08156
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a product listing that appears to be a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or a scam. No scripts were extracted, but the presence of external links suggests a potential redirection to a malicious site.

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
  • 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://pelibifir.ru/award?keyword=roland+td-11kv+e-drum+set PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445889/normal_5fef09f37f93c.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/2536935.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/nibipozutevawoborobegamos.pdfIn PDF document text
    • https://bewosugug.weebly.com/uploads/1/3/0/8/130814774/dudapa-xisikokarebag-regoketefomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_6027b53dc52da.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/xiibjcM/fancy_fonts_emoji_keyboard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_600f74385666a.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/hdhhnw6/smash_king_k_rool_reaction.pdfIn PDF document text
    • http://lavka-karamel.ru/fepejopusopozufesutu59uu.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/labofesagepozakanu.pdfIn PDF document text
    • https://rudozusaviso.weebly.com/uploads/1/3/4/0/134041113/fugatuzezodomoge.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/Jgg4cje/96886917359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sanugifop.atwebpages.com/92801336326.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/troy_bilt_5550_generator_electric_start.pdfIn PDF document text
    • http://roveramo.atwebpages.com/is_long_john_silvers_fish_bad_for_you.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 5188 bytes
SHA-256: 213ba7aae978a1173f722acf1a0c9b3c5176f8deb82a3e7c6757c5002754732d
font_01_sfnt_off0000f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 4064 bytes
SHA-256: 6d28a057dee58e1089d6d7fdb60113320d5d25cc382394fdb4d797b7a5f009da
font_02_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 10184 bytes
SHA-256: 2fd73b6c13d8ebe699b66fd211d47d720b7facbb4539446a8fa3a24bd8aa0244

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