Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe1dbf69532f78b…

MALICIOUS

PDF

42.7 KB Created: 2020-10-16 03:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: de6233c214dd78f680f1e69e6e7ea4aa SHA-1: 72b1a0e5c8926c905ee2449f2a71b0ea141ef6cd SHA-256: 7fe1dbf69532f78bb8ad633b5a4f0494aff2d0fb59054ab02265a32610d48f9e
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://cctraff.ru/strik?keyword=functional+programming+in+scala+pdf+free+download In PDF document text
    • https://site-1041598.mozfiles.com/files/1041598/wesixaz.pdfIn PDF document text
    • https://site-1038682.mozfiles.com/files/1038682/tesubewekisikisujipi.pdfIn PDF document text
    • https://site-1038784.mozfiles.com/files/1038784/gipewivobusurakevoref.pdfIn PDF document text
    • https://site-1039958.mozfiles.com/files/1039958/zurevirepegifuw.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/f283399a.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/9013956.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/360d37ad.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/f4af46d6-950a-4719-8eaa-fbcb7c58294f/66799985511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/577bb795-3e1f-4a7a-9e9c-1aa47a6159cf/46644150984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14c2cb8-3e31-4cf1-a19d-20173382d175/24263940294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ee1c24-6dd4-4577-ba60-a063bc0f2ad4/11241959317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869044d1-27e1-465c-ac61-c69a16370176/kogofejasatagav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e00f3dc-44e0-47c7-8561-1f5f5f815cf6/mowuwuwojirurasuliguwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadb2ea5-2f5f-40d8-8356-39c505dbc1d6/8876875547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10d510c-758b-44a9-bfcf-ae6a4877f749/35541684713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5cf1b6-cf35-4d46-be37-f43dbfd5ee59/getudavunen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/40121985563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0855/4670/files/freestyle_libre_instrukcja_obsugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6346/6389/files/wafapakazubedejojoxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/high_yield_ob_gyn.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5179 5520 bytes
SHA-256: e0232fac3b43b30a2782b7bcdc326011ee62e655a23c3a77eea3cda4ef510004
font_01_sfnt_off00006436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 10284 bytes
SHA-256: f39adc5a742d04fd44abe4a57ce93f1b26e0262449d9a944be7c37e2b4d7d879
font_02_sfnt_off00008781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8781 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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