Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ce97e0ee828fd3…

MALICIOUS

PDF

41.4 KB Created: 2020-10-08 05:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 778291fb46ce065ca139246200897ef3 SHA-1: 8a70c629c6db25ae3e0932274de1cd8a9fa50bb6 SHA-256: 87ce97e0ee828fd35942b7230c554ecac02a192d9a87bb7529cbd4703872f545
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/pify?keyword=rc+jet+airplane+crashes In PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/37069375044.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/40996778881.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/79733390898.pdfIn PDF document text
    • https://site-1038715.mozfiles.com/files/1038715/zukuvixirugaximowusiboko.pdfIn PDF document text
    • https://site-1039762.mozfiles.com/files/1039762/54152091444.pdfIn PDF document text
    • http://files.papshilltophoney.com/uploads/1/3/0/7/130775308/xavosowav_vezuwinoxezol.pdfIn PDF document text
    • http://files.theaustinfamilyreunion.com/uploads/1/3/2/8/132816041/xezosi_fekixojapo_lolaxe_sopotam.pdfIn PDF document text
    • http://files.mallvisionus.com/uploads/1/3/0/9/130969501/719fd.pdfIn PDF document text
    • http://files.flyingleadsaddleclub.com/uploads/1/3/2/8/132816202/melokulikafe-vuzudatege-panuladasi-zijokuvuli.pdfIn PDF document text
    • http://files.hemp-aura.com/uploads/1/3/1/4/131437157/374289538a36e.pdfIn PDF document text
    • http://files.biodiversityinschools.com/uploads/1/3/1/4/131437475/biwutudaf.pdfIn PDF document text
    • http://files.six-tech-victoria.com/uploads/1/3/2/6/132695836/e9fc6e5b72f.pdfIn PDF document text
    • http://files.sicie.eu/uploads/1/3/1/4/131453099/9311537.pdfIn PDF document text
    • http://files.smallhaus.net/uploads/1/3/1/8/131858044/7050153.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/a418097f-3cbf-40ff-ad93-f3d475bcbb26/36295423185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e185b17a-e664-4332-9d83-96d9afa15299/mubabirelepaxarutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112d32b4-df28-442b-b4d4-f04057586692/43636290663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4786337-3da2-4162-b8c9-c0b658ce58ff/xedadow.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 5104 bytes
SHA-256: 0afd27f3bc72717bb52d68cfdb8422839285899562acaf61e542fad89b5f6386
font_01_sfnt_off0000768e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 10016 bytes
SHA-256: 08cf1c64712fe4f245e862019cbaeffe02b1ec64ec1ac74f2307775c80c124c5

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