Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee5155ceb3a9266…

MALICIOUS

PDF

72.5 KB Created: 2021-03-23 04:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4cd9ff4a7ee4c6cb7de54ee63a333eda SHA-1: dfd22e3dd680c7282ac3ef09d183a8dd2327fc5e SHA-256: fee5155ceb3a9266fc9aada59b5e920c46b13f3945eeb9b347018509904d75b3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, forming a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the link farm heuristic suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xezojetit.ru/wix?keyword=goldilocks+and+the+three+dinosaurs+read+online PDF link annotation
    • https://cdn.sqhk.co/gabamulijawe/dhdjitX/syfy_shows_on_peacock.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/hfijWzO/50886299588.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/eBheidj/jomepowezosisevuxif.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/0jdjhge/16457340957.pdfIn PDF document text
    • http://cosmostil.top/oppo_105_vs_205_sound_qualityuo9ap.pdfIn PDF document text
    • http://idealica-ufficiale.site/letranger_albert_camus_bac_francaisdaglx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dixaleko/17896855666.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/50566861709.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/37631914277.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/is_batman_in_dc_titans.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_4e07e6984b494cb88831f034d8c29ef4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/33668070431.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/bronchopleural_fistula.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/zidonobagumedinosipolove.pdfIn PDF document text
    • http://birifamabaxum.rf.gd/open_source_video_er.pdfIn PDF document text
    • http://zofududa.rf.gd/46437142763.pdfIn PDF document text
    • http://bikikifuxax.epizy.com/flash_card_template_with_lines.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_413a9e6b3f0342578f61e1eac0a4acdb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/dancing_ballz_mod_apk_all_levels_unlocked.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_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 5124 bytes
SHA-256: d3e6fdb598fa88c6fcaaad118737606574835ed189e3c170e677f4e815b2ebe0
font_01_sfnt_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 9824 bytes
SHA-256: 4c673e1f80367242f695d3a5eacdbad01b646d7edf688d503dbfa276be87107b

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