Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ece52695aa9edb…

MALICIOUS

PDF

76.4 KB Created: 2021-03-10 15:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67dde8b0eb984a3d69e820f505cbe306 SHA-1: 5795fd802a38cf18fabd9cfc2e16a01f03fa58b3 SHA-256: 90ece52695aa9edbae318c448537077c2886c7c13a3e5c1350108871ac80c251
164 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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://zajinet.ru/award?keyword=banking+awareness+capsule+pdf PDF link annotation
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/2195012.pdfIn PDF document text
    • https://mipadabu.weebly.com/uploads/1/3/4/7/134751654/wisaboposuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gasosivifug/baMa319/rock_outcropping_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/i77idfb/mahjong_solitaire_games_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kagitenoru/Zhbwhdl/clipper_shaver_pranks.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/xiveda.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/how_do_you_unclog_a_hoover_windtunnel_2.pdfIn PDF document text
    • https://cdn.sqhk.co/siwebove/ijiijbc/nubixepatureliru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/various_choreographic_forms_in_dance.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_6653d1e5b1c54898b51bc38d4e937662.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/learning_drawing_and_painting.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/autocad_2018_manual_imprescindible.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/76269730281.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_e73c4c417d1a4507a9e908ea2e4af7ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/96274644278.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 5528 bytes
SHA-256: e40484fd7c6bff513178e721c3523d97f5c3491bc7fdc5cde5165e3e76c82745
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 10744 bytes
SHA-256: 09c067df2b09e36e0d3310bfb65d5a60be120f9b9bf1a930e2411d0698e8c816
font_02_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 2832 bytes
SHA-256: a12908a88df35a7e9eb57470e9a94a806bb52df392ce88a62d07cba2b79b9044

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