Malicious PDF — malware analysis report

Static analysis result for SHA-256 2958450297228c12…

MALICIOUS

PDF

80.1 KB Created: 2021-03-11 07:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63a0e54ff64d678b081ee902334a75aa SHA-1: c9782b90c93866a1611ccbd62fec231bcd476ff9 SHA-256: 2958450297228c128d08646c0d8976a42a76fd073fc242012093a262eb347b5c
126 Risk Score

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 0.9950

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://crophysi.ru/strik?utm_term=power+washer+pump+oil+capacity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372955/normal_6040235c27c0c.pdfIn PDF document text
    • http://adanakebap.org/bulowofimadegipu43n4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5fca2f17f250d.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/calendario_laboral_2020_mexico.pdfIn PDF document text
    • http://edarudost.online/caste_validity_certificatep84n3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_6044fce2a7b03.pdfIn PDF document text
    • http://austritkfa.com/free_editable_jigsaw_pieces_templateqpev7.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/74773214020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fe3e7c518c06.pdfIn PDF document text
    • http://kataeta.club/relative_adverbs_4th_grade_worksheet4f8ed.pdfIn PDF document text
    • http://qqkaxes.xyz/19650705382hnja4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_602f7036e91cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_601ff97005619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_602395595a091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_602198fc719b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424646/normal_6003965bb42c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450421/normal_5fcef39d337f4.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/62519345531.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://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_f2c14539b64c4e27b58770c62e0debb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/72215149712.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_be82da0e419645d4ae9831998e69c1e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/91980472117.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_e23f7fe9dd2a4a5699802a97a69e1f48.pdf?index=trueIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_92224bccff764c26a2308a38cce918c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/sinubasuvopopam.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/96586059914.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/91185383978.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/casadio_dieci_a1_manual.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_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 5144 bytes
SHA-256: 6b32b097381fc861810ed88e26a7c9d8953696bcd35f1bfacf0fe6d942c91eb5
font_01_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 10084 bytes
SHA-256: 43e5d5d8e8b72a6d27d5396a409e9130d264d9865e1b57f79869cbc7da3a254c
font_02_sfnt_off000124b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176