Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9308e815fb0caa1…

MALICIOUS

PDF

48.7 KB Created: 2020-10-08 11:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f6f281f78e3474dc863fefac81ca90ae SHA-1: 660d23bb7d4ed49fe40d58667252506b23762cc5 SHA-256: e9308e815fb0caa13f0802ebccbb75727f7b21b6b8f2de5c2ef0e07449f80416
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=real+book+volume+3+pdf In PDF document text
    • https://site-1039840.mozfiles.com/files/1039840/24998791915.pdfIn PDF document text
    • https://site-1043599.mozfiles.com/files/1043599/wiparipix.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/fugogazegabodil.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/33162413768.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/35904287848.pdfIn PDF document text
    • https://site-1040503.mozfiles.com/files/1040503/92544722000.pdfIn PDF document text
    • http://rufebenob.thevillagemiami.com/uploads/1/3/2/7/132712139/a0b80fa87e330e.pdfIn PDF document text
    • http://files.hmtaptf.com/uploads/1/3/1/6/131607164/e936804bc.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://uploads.strikinglycdn.com/files/8b4b845b-ce43-40ca-8cdd-cd8ba4025200/tavobexad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fa6638-6e89-4810-a240-e6991579ccee/tupotutewusej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730bb8bd-cad3-4461-b339-39c793213ce0/4245932931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f9d91c-26f4-4f58-b2fd-15a423d2dd17/80226970855.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_off0000668a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 4996 bytes
SHA-256: ddaf931712ced78181b46c22d8465345833842738a0e368aebfea588d338309e
font_01_sfnt_off0000779a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779A 15764 bytes
SHA-256: 7efb73353e4596ca095401c75e9edd1d42b80935d96f99c70f503906ff4fab7f
font_02_sfnt_off0000a810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA810 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361