Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b5932995036f94…

MALICIOUS

PDF

89.2 KB Created: 2021-04-02 08:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ee07a086a0aad3de70c03fee50bcb6aa SHA-1: e5f2b1b0966aca12880ac25b489be0622967b49a SHA-256: 64b5932995036f94480cd5fbaf99af49962eb903561d57549dd83c6f930adfdc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=tai+chi+108+moves+names PDF link annotation
    • http://grusha.space/81228799617iwqnz.pdfIn PDF document text
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/buvozowizus-xenepu.pdfIn PDF document text
    • http://neip-forum.fun/7711121054002wes.pdfIn PDF document text
    • http://3203epworthcres.com/jazomukotulaxujadazu6wwz2.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/010816d8435.pdfIn PDF document text
    • http://fakts.design/what_are_descriptive_wordsfg836.pdfIn PDF document text
    • http://verification-help.business/deep_purple_child_in_time_tabku1pi.pdfIn PDF document text
    • http://mosquito.codes/segenoperojuxqn0eb.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/gigorufigew.pdfIn PDF document text
    • http://excschool.ru/rikimey4w7d.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/fubolijibopas.pdfIn PDF document text
    • https://jafuxanabowam.weebly.com/uploads/1/3/5/3/135383447/bubiwole-zoravabedogifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/301d45ec-33d3-4b3d-b9e8-32a78059a4b4/45361503660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884b8d4a-f136-47f1-817a-4c532c254c14/playboy_magazine_cover_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d359436f-ad55-44ba-a029-5510f1ba5386/how_to_set_krups_coffee_maker_time.pdfIn PDF document text
    • http://reduxaxu.epizy.com/dialectics_of_seeing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4363c2bb-b3bb-45fb-acac-455555fbce89/corporate_social_responsibility_definition_business_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeda5103-f41c-47bb-8886-af663ea2eba9/hotpoint_gas_range_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01018761-492d-4313-9338-1d13e0b276d6/93785605252.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/mirakukujofojaxisawenig.pdfIn PDF document text
    • http://zujoragog.epizy.com/kixaw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 5300 bytes
SHA-256: 189478bca0cc0f676025e3fa10f26e9f38839b2c12ee4e3d02704837b882a6ae
font_01_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 5016 bytes
SHA-256: 24f259c0eadc43bbd55447d25b29323fd80b80bcc2504b7825521b4157009d30
font_02_sfnt_off00012219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12219 11560 bytes
SHA-256: 8c0bb51439965506ecae44f957717560a63e99ffd815de5ed10a2c2052448403
font_03_sfnt_off000147cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3