Malicious PDF — malware analysis report

Static analysis result for SHA-256 1764f7dc8ef1eb98…

MALICIOUS

PDF

65.8 KB Created: 2021-02-10 20:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b25ee04c7064fb6b6e821e9d84f0488a SHA-1: a4141700a4c5923387ef97f9efa251fff411c234 SHA-256: 1764f7dc8ef1eb987e05d2f0b51bf3c0de5eaab865a85aeea70340e3be31f7db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/123?utm_term=fisher+price+soothing+motions+bassinet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443803/normal_60112dbeef294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5ff5197ee8cf9.pdfIn PDF document text
    • http://nebibila.iblogger.org/genealogy_of_the_holy_war_pairing_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/ha2ru8b/jupoj.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/KYjhgcn/nuremafo.pdfIn PDF document text
    • http://sodazetibup.iblogger.org/handbrake_video_converter_for_windows_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_601df4a5e92a0.pdfIn PDF document text
    • http://sweetygirl.club/jutexurojixisoxoputivuze8mobu.pdfIn PDF document text
    • http://hopecommunitynaz.com/meiou_and_taxes_guide6gmhu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_600eea8f3e7cf.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/tizowodifi/nitadiguza.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/28277315722.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/bali_ka_bakra_video.pdfIn PDF document text
    • http://miruwofewap.rf.gd/42974722346.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_off0000c3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B1 5408 bytes
SHA-256: ac4575d0bb35c1baa609b6477b9b16d7ed2d62b93e542c863fc56a453fe7d5f1
font_01_sfnt_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 10844 bytes
SHA-256: d88d3def04e658757c21ed391d2b9b203f164cd153f032ddd3b6b7e853de2364

Open this report in the interactive analyzer, or submit your own file for analysis.