Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bc6d898f64310e…

MALICIOUS

PDF

83.1 KB Created: 2021-03-02 19:16:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 99dc77375ca01fd12110204c4bf96f6b SHA-1: 02a13093c859ff1a08e79f8ae924f0ad8155e046 SHA-256: 46bc6d898f64310e8c1d3af8f8b7bd9a594b351d80add7baa837f22cef3cb90a
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The presence of multiple external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=freeport+the+city+of+adventure PDF link annotation
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/zexufufodofapeloko.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/ghZidzS/condado_pittsburgh_reservations.pdfIn PDF document text
    • https://zizobisorodevu.weebly.com/uploads/1/3/5/9/135964877/b38a46fa6.pdfIn PDF document text
    • https://kikuramem.weebly.com/uploads/1/3/2/7/132740701/zimave.pdfIn PDF document text
    • https://dolilugufup.weebly.com/uploads/1/3/0/7/130776220/3059854.pdfIn PDF document text
    • http://rkconstructionsucks.com/86023126630ml8k5.pdfIn PDF document text
    • https://cdn.sqhk.co/pavupaken/LXeUVib/46760612445.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/f323fd3.pdfIn PDF document text
    • https://molapoji.weebly.com/uploads/1/3/4/0/134096941/b4fb817f8f8de79.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/macbeth_act_4_scene_3_analysis_cliffsnotes.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/9485312.pdfIn PDF document text
    • https://tesajezu.weebly.com/uploads/1/3/1/4/131452821/ditimevib-fosekiduvopiwoz-mobanina-tirub.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/bogovelikalat.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/wadilujoviwipik-lugizefap-wadukep-kinuwugomu.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/libeganot/noratujagopuzikis.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/febosafopesoluzujujaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/kifodigosagefowagavebawu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/kwsp_majikan_registration_form.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_off00010934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10934 5148 bytes
SHA-256: ff09386b5a55706d96dfadc109e466e3f998f2504d3f71ef342b24fcec8db34c
font_01_sfnt_off00011acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACB 10652 bytes
SHA-256: d23f54724acd404018e6a4fd221c73c331e0543aa8d485dee164a50f8a0e428a

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