Malicious PDF — malware analysis report

Static analysis result for SHA-256 1094d9f7e5974dd0…

MALICIOUS

PDF

63.3 KB Created: 2020-12-22 03:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e647a6d3a0d870d7a829510f6a2722cd SHA-1: e3e65e05536c874fafd9338152ebc4458689bcaf SHA-256: 1094d9f7e5974dd039ceb5e7c56d6fbba74c580d5359d664bfcf6800e521bb81
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 disposable hosting and redirector infrastructure, indicating a link farm or SEO poisoning attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'traffmen.ru' as malicious. The ML classifier and ClamAV also strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • 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://traffmen.ru/123?utm_term=lil+wayne+lollipop+lyrics In PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/839090.pdfIn PDF document text
    • https://davixugamewa.weebly.com/uploads/1/3/5/3/135334906/susitaperiwow.pdfIn PDF document text
    • https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/f5abf5bd215e57a.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/f03df955339.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/lutojazesuzeliz.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/24f87e0f-74cf-4654-8bfc-42951abef2d4/yiruma_kiss_the_rain_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b5d5bcb0228a2a17c6c/t/5fd17be4880fa23343cac4b8/1607564260763/nazoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/attribution_theory_heider.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628bc7e9-0a48-463f-b089-f00c087ac7c6/649870391.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc656c012facd59ced21f8d/t/5fd1a57bad61ab5831877d07/1607574908036/wemesonajiwimokukalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb73b3b5-3210-4f8c-85d0-c2b03dfe34d5/63141569277.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67727bd14ff0dd2c2c47f/t/5fcba278393ce473563758c5/1607180921681/dugumasidugewodifitumab.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/zarezeremidaduzixixal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6260bbe7-9860-46b8-94ee-d4514c4fee02/nexigopukorivukibi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc80e9ff99f865bfec01c9/t/5fdcf8d38892f334f50f9529/1608317140934/watowilesivedemolexotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b01c38-225b-478c-9f8c-002421cdefb7/wagner_middle_school_teachers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d26e74-9443-4b8d-9c73-8f0c9a6f4a7e/57012103164.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_off0000b122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB122 3244 bytes
SHA-256: 62a8feaef1631771c5ee8dcf8a8c20ab9bb0a86be6000684ddd9e51aed4a4538
font_01_sfnt_off0000bcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDE 5064 bytes
SHA-256: 4b9e9595ed845ce57eeaf0ff7232c4476d7dbfbe94d1912a4f18c91cac29e993
font_02_sfnt_off0000ce42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE42 10596 bytes
SHA-256: 5cac987b2fd3723152e1db0507d4fb5806e24735881079caae24fcce6774f63d