Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c05004f710d1cb3…

MALICIOUS

PDF

85.6 KB Created: 2021-04-15 06:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 842dc6bcd237263895595c5980b2c99b SHA-1: 5fdf7fe89890073ae4a3b540cf2099ec33087c8a SHA-256: 7c05004f710d1cb3ac7a80e40fbf0222f87e10bed0b55fe39d8a178fd9c717f3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://seumenha.ru/strik?utm_term=fallout+4+settlement+map PDF link annotation
    • https://cdn.sqhk.co/delobepaziw/ha0jchf/aaron_rodgers_contract_details.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/M6ghhi6/pigajezulakivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_6049f7c10e4d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481417/normal_600cd19c2699c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5fc809a01a7e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5ff7bbdc8c89c.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/ierjg7Q/20961846454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_60684c4b987d3.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/behaviour_at_workplace.pdfIn PDF document text
    • https://ririzunok.weebly.com/uploads/1/3/4/7/134712782/9499361.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/sticijh/gosset_brut_excellence_tech_sheet.pdfIn PDF document text
    • http://jitokinut.iblogger.org/adfg_fishing_guide_license.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/irO2hd2/38293574317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_604d0e1166f71.pdfIn PDF document text
    • https://jotavitot.weebly.com/uploads/1/3/0/7/130738821/d16279ca4a98.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/bengali_niramish_aloo_dum_recipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_602eb8d5d06a6.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/apa_citation_manual.pdfIn PDF document text
    • https://dagazafija.weebly.com/uploads/1/3/1/4/131484603/530bd410c815a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_5fd3247c7b13c.pdfIn PDF document text
    • https://tifedagarowab.weebly.com/uploads/1/3/4/6/134641562/dcb76b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexivire.epizy.com/27260741776.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_off000113f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F4 4912 bytes
SHA-256: 4a35380dce1c6d6dddf412477fcc9b8a1ecb444f3448154a0c78636fe93a9dbc
font_01_sfnt_off000124a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A5 10712 bytes
SHA-256: 28b209ac43b7be675b0192e3d0eb70fb59152010e0a0b67bf902926fc6c38f3a

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