Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed2601aff5a11ed…

MALICIOUS

PDF

80.1 KB Created: 2021-03-14 15:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b11ce1096feed76e3cea17249b7247 SHA-1: 939d2670fe921b076fbfa9fb4150ad4bec4d76cd SHA-256: 5ed2601aff5a11ed533d54657691cadb8cc716e9ea113f6884cd5e215a2a989a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm for SEO manipulation or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan delivery. The embedded URLs are the primary indicators of compromise, directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=liturgical+year+simple+guide+pdf+download
    • https://static.s123-cdn-static.com/uploads/4404529/normal_600923462213f.pdf
    • https://xulewanexu.weebly.com/uploads/1/3/4/1/134108589/nedukatewawu.pdf
    • https://jiviwakabukowe.weebly.com/uploads/1/3/4/0/134096071/jabudibuxit.pdf
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/nozerozalavamu.pdf
    • https://cdn-cms.f-static.net/uploads/4485823/normal_603ead1c9be8e.pdf
    • https://cdn-cms.f-static.net/uploads/4420222/normal_601fa08e693bf.pdf
    • https://rebodegumirimak.weebly.com/uploads/1/3/0/7/130775130/puvazasapujaso.pdf
    • https://cdn.sqhk.co/fapolokid/Lpja4gi/amazing_facts_about_earth_s_atmosphere.pdf
    • https://lelibajoterudu.weebly.com/uploads/1/3/4/0/134042739/kibefebizaw.pdf
    • https://cdn.sqhk.co/zuvifilezaja/ghrxxjh/tupiniv.pdf
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/belurutofosijibirok.pdf
    • https://cdn.sqhk.co/pesuxitum/chcgigf/39259827819.pdf
    • http://vufulilaririvu.iblogger.org/mamiya_rb67_pro_s_price.pdf
    • https://cdn.sqhk.co/zokosofu/qgiVdNs/little_heroes_league.pdf
    • https://cdn-cms.f-static.net/uploads/4388293/normal_604d76739122b.pdf
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/2c7065ea47fcb2b.pdf
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/9533660.pdf
    • https://cdn-cms.f-static.net/uploads/4487662/normal_604a4ca124c54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xulojasadiv.epizy.com/company_organization_chart_sample.pdf
    • http://rixuzomobe.epizy.com/gegelu.pdf
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_01d02ac6a7b04fc48362879b24105ba0.pdf?index=true
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_46f2de82b53e4a10abb3b94562b33274.pdf?index=true
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_76ca983c3f5848ea83f054fc86e182cc.pdf?index=true
    • http://zaxodeziwepaf.epizy.com/brother_pe770_software_for_mac.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8d3.bin
d66a8f276ee455e73d7d04462f6f757e6495aa8bfddcd4006ac635bd846b3cfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 5612 bytes
font_01_sfnt_off00010bf3.bin
3a93b209c9067ce77af42de6864233d7acb9c2497381990e145a5ad9ed884977		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF3 10796 bytes

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