Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b80e22587dea1d…

MALICIOUS

PDF

83.4 KB Created: 2021-01-12 13:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: deb027f64c10e62d952ac0919091a1ad SHA-1: 72f5acaf02c15ae33d4c69db3c44eadaf0f0369b SHA-256: f5b80e22587dea1d6ac0c6991faa03d0dd135ba34c38496828fdf4e9e9ac4fcb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with several pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or scam attempt designed to lead users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=uiview+transform+autolayout In PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/684278.pdfIn PDF document text
    • https://site-1168537.mozfiles.com/files/1168537/jump_ball_game_2.pdfIn PDF document text
    • https://cdn.sqhk.co/muxaferamet/g1jhyjj/frozen_vegetables_ninja_foodi.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/1776312.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/21003f28100.pdfIn PDF document text
    • https://site-1176264.mozfiles.com/files/1176264/29863724996.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hhjaYiK/baruwen.pdfIn PDF document text
    • https://ganalazukomej.weebly.com/uploads/1/3/4/7/134714395/sazukiboroka_pidopen.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/jfhdhim/retro_arcade_game_controller_games_list.pdfIn PDF document text
    • https://site-1178182.mozfiles.com/files/1178182/65794884064.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/YbhbRhh/smoke_detector_sounds_once.pdfIn PDF document text
    • https://site-1172175.mozfiles.com/files/1172175/17048472455.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/zerejibixupav/cessna_182_performance_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/tosaresoxirobumidinadibe.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/jajivupezepesafowa.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/66112653854.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 4596 bytes
SHA-256: ee7d2daf70aac65c7bc8f55316033c63d229f7735eedeb0e7d90ecce0d30e4a5
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 5156 bytes
SHA-256: e3c658ed7cab9f713f0590eef5262b3db9d0e73f0a2782b5006800c4791d8990
font_02_sfnt_off0001173b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 11992 bytes
SHA-256: b6d5eabace113a2e4f8d2fd151334aa01e638715fa62b0d56e87e224c6c1a812

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