Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b1a0373c8845d4…

MALICIOUS

PDF

45.0 KB Created: 2020-10-02 23:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2dd2306e92a914d1bd8975503f3f093b SHA-1: 91ef1a74eb2902c0ea3c2425ba172fe2541335f2 SHA-256: 61b1a0373c8845d461eae3a40e11141d39c864d487564f5f0afb872f5fea6cec
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://gettraff.ru/strik?keyword=learn2serve+texas+food+safety+manager+exam+answers In PDF document text
    • http://files.blueskytherapy68.com/uploads/1/3/0/8/130814874/sujetumimefabagudez.pdfIn PDF document text
    • http://kinuma.melodyarabo.com/uploads/1/3/0/9/130969723/8333381.pdfIn PDF document text
    • http://files.cookedwithhart.com/uploads/1/3/0/9/130969889/lamorus.pdfIn PDF document text
    • http://files.southaustintkd.com/uploads/1/3/1/4/131453902/demosabowir_banubonez_tuzorod.pdfIn PDF document text
    • https://site-1039386.mozfiles.com/files/1039386/bumuvuxigagesudo.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/vuwanofogepotifeluzeti.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/musidavafuwelavuwak.pdfIn PDF document text
    • https://site-1038497.mozfiles.com/files/1038497/vanodotidufoboga.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/56578978-6e8c-4ae4-9939-67be1b781108/97175310230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc826a1-0035-407b-a50b-124d89574a63/zijudifivokuvopiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9f4cef-3062-41ae-a2b7-fe66b72a5711/56829834980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b4390a-cb84-4918-8819-3ca285c0d605/pugejed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f83e440-a476-4cba-ac8b-ff8a8db43b2c/gigax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da65a3c7-0f61-473e-872e-7e2a030b9924/gudigisunozugilatujuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f589037-8428-4673-ae67-61cc5d55661f/50747896674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bedb1b67-6c4a-42ad-abf3-1407994e5da0/88198223613.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 5592 bytes
SHA-256: 2b1834754110185e9615b29c871c9d4e18e204be6a1412cd9a03d0d85aaa7b19
font_01_sfnt_off00008278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8278 10612 bytes
SHA-256: c4cb89497d30c1d053e0c11ee5812b5e10a2637c60f6653f871736e3813fd7dd

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