Malicious PDF — malware analysis report

Static analysis result for SHA-256 af98c9d50f3fe0b4…

MALICIOUS

PDF

81.2 KB Created: 2021-02-19 13:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8caeca421ad394eea147b923b201c8e7 SHA-1: b3ae89416c6ee344fe8e49f1fa2cc3fbd44464f9 SHA-256: af98c9d50f3fe0b48fee9d559f210b81397aec6e5d3fc570871d986426e66437
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a large number of external links, suggesting a link farm or distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=pokemon+diamond+and+pearl+walkthrough+pdf PDF link annotation
    • http://shop-profildoors.ru/bloodborne_pack_by_team_talev6ya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_6012de266038e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_5fcf5b7bf2637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_602bf3cfd0b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fdc29b92f01d.pdfIn PDF document text
    • https://zitozujenuzudip.weebly.com/uploads/1/3/4/0/134042901/2282532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496828/normal_5fe2ccbc0477b.pdfIn PDF document text
    • http://milano-moda.space/a_p_name_wallpaperl699n.pdfIn PDF document text
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/fodurexegibudaz_reziniwuzudo_pejapawuxekivid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_600159f16eb10.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/change_action_bar_back_button_color_android93tw8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5ff4a278eee9e.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/69933663367ex9j7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5fc5ea5312824.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5fe157dcd74bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_5fdc16f8a90a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://revuzulikasulo.epizy.com/84777163061.pdfIn PDF document text
    • http://koraxirimaxodet.epizy.com/pekezivomiwogoxazineka.pdfIn PDF document text
    • http://fodevixitawedur.epizy.com/nuclear_equations_worksheet_tes.pdfIn PDF document text
    • http://saperemobopiga.epizy.com/56476357868.pdfIn PDF document text
    • http://nujexaraxeb.epizy.com/50764396498.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_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 5432 bytes
SHA-256: e1c31471e5c2407e5d54817be2c52a5e4bddcb550d8223dde7294e3a6b8ac8d2
font_01_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 10588 bytes
SHA-256: 4484bc7e082f474bfa1190ac838576de5ae69604a303e41fd8325305938690f4

Open this report in the interactive analyzer, or submit your own file for analysis.