Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e03342794e2cf1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-09 14:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c24a362be8b10305a1d9b629b781ce7 SHA-1: 13f4668a94e832f6ac749042faffb00a710c4231 SHA-256: d7e03342794e2cf163a05cea3aea7e330af2dd7174368a5075e66f5f3267ca6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of many links suggests an attempt to obscure the true destination or host a large number of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/aws?utm_term=what+are+the+similarities+between+impressionism+and+expressionism+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467975/normal_6003361032b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_6033d1c11d473.pdfIn PDF document text
    • http://ca-management.website/ms_dhoni_movie_in_hdy8f89.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/696542.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/ijhbwkb/enyo_pharma_crunchbase.pdfIn PDF document text
    • http://hookup681.site/futogazovavazuykjtk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_602e30213344a.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/xukovulanifujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_603f0e157fb11.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/9685816.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/vinegejog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_603a7c2b51a1e.pdfIn PDF document text
    • https://kotazadan.weebly.com/uploads/1/3/4/3/134349323/nexunuzos_zonejinuxiwin_jidejanaw.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/jc2xhef/hong_kong_coronavirus_today_scmp.pdfIn PDF document text
    • http://fc-aromat.ru/huckleberry_finn_sparknotes_chapter_7ndond.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/pesof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4849caa0-6459-4659-bdb8-a95f52ba64dc/what_is_a_smart_goal_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75a1a14-be75-41bf-9c4b-f11676b29070/79918416046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fef2c40-5a68-4ae9-8ef8-89273db3693b/99271179307.pdfIn PDF document text
    • http://supetok.rf.gd/bulleya_female_version_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb2a080-f126-4f60-8fdf-cf180eccd137/wings_of_fire_memes_glory.pdfIn PDF document text
    • http://juruzozesema.epizy.com/barcode_maker_apk.pdfIn PDF document text
    • http://tewilojejesuj.epizy.com/powodofilunibejimovulona.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_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 5628 bytes
SHA-256: 4e531957c14739969392c741e0f1b1a272b3ec677f117a5db7031b7f1275efd5
font_01_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 11132 bytes
SHA-256: 835c3e6bfb8ca18f7c35eef6a775c1a57d7151e48b9f7b509eee251830e58873

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