Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f43b02ff6b52e40…

MALICIOUS

PDF

94.3 KB Created: 2021-01-11 14:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0836e839adc3dca3125497e8326c2ae5 SHA-1: e65d7ae96b193bf6eecb80fb20aae136f04c3cca SHA-256: 6f43b02ff6b52e4031c985f158dfd510541ed21d284cc85c6a1555efae5bd49d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The primary malicious URL identified is https://traffset.ru/wb?keyword=eggplant%20emoji%20boxers, which is likely used to distribute further malicious content or conduct phishing.

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
  • 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.
  • 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://traffset.ru/wb?keyword=eggplant%20emoji%20boxers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482023/normal_5fcb1e23d9e75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8743544fced.pdfIn PDF document text
    • https://site-1168125.mozfiles.com/files/1168125/tasivatobisuzotadaxamo.pdfIn PDF document text
    • https://site-1175421.mozfiles.com/files/1175421/disney_movie_quotes_quiz_printable.pdfIn PDF document text
    • https://site-1168462.mozfiles.com/files/1168462/funny_videos_jokes_and_pranks_just_for_laughs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387406/normal_5fe00ad99eedb.pdfIn PDF document text
    • https://site-1177098.mozfiles.com/files/1177098/donefixatagopes.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/ichiaib/53996326007.pdfIn PDF document text
    • https://cdn.sqhk.co/razonavari/rif4HBW/cinema_starlight_drive-_in_di_pontedera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8738515c616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dozore/performance_appraisal_comments_for_team_leader.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/godawo.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/dispute_item_on_transunion_credit_report.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_off00011e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4D 5168 bytes
SHA-256: ce79a3ad47b82946e711dfbe67221d7d71b0af4da0a7b14acfe28344756e6bdd
font_01_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 13632 bytes
SHA-256: 11491941308d0502652a34f2444168aa3fbb5f0196e6724afb4ba92fbee92f6c
font_02_sfnt_off00015e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E81 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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