Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e0fd67cfad477f…

MALICIOUS

PDF

77.3 KB Created: 2021-02-27 16:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 96ffe38292cd798e3f7eb5d7f5cd17cb SHA-1: f7258ce24413346aaf67eb46a1b6dbb62c8c5b18 SHA-256: c2e0fd67cfad477f8aa484cda9cbc8f4480c04aa4d3fe1a396a80b43c43eeb46
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The primary URL, 'https://pelibifir.ru/strik?utm_term=how+to+start+off+a+song+for+beginners', suggests a lure to a content-based phishing or scam site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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/strik?utm_term=how+to+start+off+a+song+for+beginners PDF link annotation
    • http://mobeditobaxul.scienceontheweb.net/msi_h81m-p33_cmos_battery.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/i7gdgcX/51116897933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5ff637f6e3497.pdfIn PDF document text
    • http://vidclips.design/counter_strike_1.6_indir_botlu_trke7hwe8.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/31b68e77eb897b.pdfIn PDF document text
    • https://kisagisetiduke.weebly.com/uploads/1/3/4/7/134762251/2509cffea55.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/faboziv_gigixoxojenora_suxiza.pdfIn PDF document text
    • https://cdn.sqhk.co/xezexasag/EbiboO1/zofakojomobekifojexaj.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/gebibdY/nubenikujuxuvujem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489835/normal_603918964dbf2.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/gguhdt1/ganudoxemamomiwuzajaveta.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/rgeXXSr/66926877293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_602ec72943385.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/Xhgggnk/toxasetematikopedogimoti.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/is_aerospace_engineering_in_demand.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidaxiwuk/xjegda5/zombie_age_2_apk_mod_money.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/womizik.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/bergeys_manual_of_determinative_bacteriology_latest_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 5096 bytes
SHA-256: a9572fb9e6c0fba2d99188c452d36339bb368fff865165374b0b156e7e785385
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 10936 bytes
SHA-256: 24e3eeeea133f8e37d0af3a9f10540121a3d400a39b950575277c47a59057967

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