Malicious PDF — malware analysis report

Static analysis result for SHA-256 281efe1ccef897b7…

MALICIOUS

PDF

89.2 KB Created: 2020-12-18 13:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4102c025329a8183e127262bf7354427 SHA-1: 2f7cd6c09ef857972a1c07fd14a34c318fe11a83 SHA-256: 281efe1ccef897b72d297102083204ec60df5c325103e6f83fe9932d1d243baf
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO redirectors, indicating a link farm or phishing attempt. The presence of the URL 'https://trafftec.ru/123?utm_term=melrose+park+dmv+road+test+route' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/123?utm_term=melrose+park+dmv+road+test+route PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485322/normal_5fd07575ae81d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f9a3f2923c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f874f567b3a2.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/381aa75.pdfIn PDF document text
    • https://gasagadivegolix.weebly.com/uploads/1/3/4/4/134488570/4648824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fa1816cf24ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fb3f76aa3b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412902/normal_5fa41fba2e541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58be1e5c7695ca9bb0521/t/5fd620ebffab5d3c56f21c7b/1607868651533/octonauts_creature_report_gulper_eel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35efaaffbf90a66fa355a/t/5fcd1e8ed336b863f0c9af0c/1607278223754/green_bay_packers_game_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/unblocked_games_77_bad_eggs_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ac2eabaecd331842ccaa/t/5fd04ed1125f6a657a497271/1607487185857/merge_monsters_lyrics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6392bc819f1cf4d07cf9/1606378386571/85721371173.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59cfe2e537a05ef29188a/t/5fd05b2e5347e801a81ea2c5/1607490351236/registro_do_brasfoot_2020_para_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389629955c744b54c2322/t/5fc495e43f75b166436680a7/1606718949002/trend_ls_pushrods.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d38511f6a419849240a0/t/5fc57043fa04221c71d803ab/1606774851500/44601810261.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_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 5232 bytes
SHA-256: ca78df75e8296a1e11f8e95f1d72d353d8bf324e1d299cf643042782d6353b6c
font_01_sfnt_off0001302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302E 11868 bytes
SHA-256: 93a0a44c0caa984ceded8095267c25447fc338e436913f259d973a1a2faabd57

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