Malicious PDF — malware analysis report

Static analysis result for SHA-256 577fcb17415faddc…

MALICIOUS

PDF

83.2 KB Created: 2021-03-22 12:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dcd27e965cf1446c43505fc24c72846 SHA-1: dca9185732bb83878b51b01f591656dab3d7228a SHA-256: 577fcb17415faddc6ec66bc350dd6e025769b6810fabf39d512fd1c88b2b6b92
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to suspicious domains, indicating a likely attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=marilyn+matthews+miller
    • http://auto-agents.space/4624749539tmv6i.pdf
    • https://cdn.sqhk.co/pikuworano/fghifja/profibus_d9_pinout.pdf
    • https://cdn-cms.f-static.net/uploads/4405193/normal_604666b830e33.pdf
    • http://investorlands.ru/seruvalaledomeo66sm.pdf
    • https://cdn.sqhk.co/gediwuwanol/ihDHyih/my_first_baby_toys.pdf
    • https://cdn.sqhk.co/wikelere/AghheIz/sunekigorivexadevezuvipa.pdf
    • https://cdn.sqhk.co/mofokamibe/cV8xpSB/cake_recipes_for_diabetics_uk.pdf
    • https://cdn-cms.f-static.net/uploads/4486365/normal_602fd04a48a11.pdf
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5ff911cd25c97.pdf
    • https://cdn-cms.f-static.net/uploads/4465257/normal_60261c4c95c68.pdf
    • https://xezajorawelo.weebly.com/uploads/1/3/1/4/131408008/e8407c5524.pdf
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/925983.pdf
    • https://cdn.sqhk.co/nebafori/egfgfgj/brawl_master_apk_mod.pdf
    • http://bulakirip.getenjoyment.net/82444085978.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tamobalasu/seagate_blackarmor_nas_440_firmware.pdf
    • http://wemaxoseni.myartsonline.com/tableau_training_for_free.pdf
    • http://wuxosalilujaza.atwebpages.com/xalinewevepilalivusa.pdf
    • http://movasedumanepe.onlinewebshop.net/gasanevaromalu.pdf
    • https://s3.amazonaws.com/saziwijaxodav/bloody_roar_3_for_pc_setup.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_off0001076f.bin
77c383b8f1b98e33ccb797dcc65dc652834241c940157fe89d3f5c96327ae7fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 5124 bytes
font_01_sfnt_off000118d2.bin
3fdd34db3f2027b2b867bbecee250f695403ab5e39b5337531e9c7ad440d7038
pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 11460 bytes