Malicious PDF — malware analysis report

Static analysis result for SHA-256 759accc678ab225f…

MALICIOUS

PDF

78.9 KB Created: 2020-11-18 09:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f4c7abf3de4ea989f00e0e373459fe8 SHA-1: 1974c9b846fb16f233dba810cda2e1927f0d1642 SHA-256: 759accc678ab225f4e914a32c1e457720e0c176c9fc970272670c56e2c9a6f48
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains and potentially disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous external links suggests the document's primary purpose is to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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 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://gettraff.ru/123?utm_term=relationship+principles+of+jesus+pdf
    • https://gixeguxif.weebly.com/uploads/1/3/4/5/134522915/rameronixenor-mafidusag-mapatamilav-manolasa.pdf
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5f94176df2078.pdf
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5fad76415c755.pdf
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f968ee5c5d3d.pdf
    • https://venepefo.weebly.com/uploads/1/3/4/6/134666716/10d389226.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdf
    • https://jodiwovuf.weebly.com/uploads/1/3/4/3/134368652/gonab.pdf
    • https://tefuxaforubexo.weebly.com/uploads/1/3/4/4/134446539/3705636.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sugowubuf/the_sims_mobile_unlimited_money_apk.pdf
    • https://uploads.strikinglycdn.com/files/c2f9cc52-d6c3-4adb-8384-481bd60d4f21/90063647053.pdf
    • https://uploads.strikinglycdn.com/files/affe34e2-d155-4d7b-90f7-9b20fe0eca65/bubblegum_club_wassup.pdf
    • https://uploads.strikinglycdn.com/files/70ee60b7-b0ec-4948-932e-b68cab949653/going_home_mark_knopfler_sheet_music_free.pdf
    • https://s3.amazonaws.com/gifiz/first_source_llc_closing.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e42d.bin
2a4a31129167ca5b5c61a0f6aadb6ed00fcb8359b239d5aef6f916fe50a25da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 3148 bytes
font_01_sfnt_off0000ef57.bin
6546d68f500b9e82a16bda3ee730345bdbe5281aaacd9b9b8084cd6a2e2cfc82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 1720 bytes
font_02_sfnt_off0000f7c7.bin
d9d830d54731b19a6a80ed14e636fa6e9425d2810817aecd7a3cf77bd752437d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 5328 bytes
font_03_sfnt_off000109e6.bin
1f016f8439a313b937482c9debcd3206405563ba6cd9f73f6ac6687a971c27b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 10556 bytes

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