Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3abbc6176e8ab73…

MALICIOUS

PDF

70.4 KB Created: 2020-12-04 15:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 814864b4e5eeb165fdd012f82483b590 SHA-1: e72b09190a1ef0c9d4714c2c75c1991777e57413 SHA-256: b3abbc6176e8ab736fb300de018192c273f9b48cf939462cc748fc45261c2c32
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The primary malicious URL identified is 'https://traffking.ru/wb?keyword=for%20honor%20observables%20and%20breakables%20guide'. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

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 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.
  • 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://traffking.ru/wb?keyword=for%20honor%20observables%20and%20breakables%20guide In PDF document text
    • https://nefenupenarus.weebly.com/uploads/1/3/4/4/134476068/cb8567fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f9cb3f7dfe23.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/fovedaboziwava-ritagaw-lufivinis-xoxaleralepu.pdfIn PDF document text
    • https://lazesomixasima.weebly.com/uploads/1/3/4/5/134588612/8edc6d.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://static1.squarespace.com/static/5fc1480d27a199023ab7f389/t/5fc2aaf4bc819f1cf42feeb9/1606593269763/35574303926.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553500b6b03258f52b7d8/t/5fc93ab71849bf380e3dc719/1607023300831/kitazakusifudir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f194f98375720a912c6/1606295322105/camille_vs_riven.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7fbe9fc3622d5227cd2/t/5fc212ed2dd96f5918363f8c/1606554350766/cams_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a8f348c1673e559e38e9/t/5fc992d6fedaa13a485b310e/1607045847181/mario_kart_stars_top_left_corner.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf496ccb3e0f57714594de/1606371693050/lyrics_for_7_years_old_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17c18c6-8007-47d8-a79c-1d8e1382e8ed/derecho_mercantil_octavio_calvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c777cb03-4a51-4395-86ec-f1be8d699e4e/74054603722.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3963c12facd59cebdd614/t/5fc3fa513c02f22b9d88569a/1606679126722/iomega_external_hard_drive_mac.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_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 5108 bytes
SHA-256: 7778150602309a9e31d3ac40391d8009c418d59a6fa4ecc4fe08200602b2c268
font_01_sfnt_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 10876 bytes
SHA-256: 28977c501a96e8f0defe638a3dd273d68d3c660b516d1b9a195eb5a03fea7e4b
font_02_sfnt_off0000fec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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