Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe877955ce81d666…

MALICIOUS

PDF

52.0 KB Created: 2020-10-01 03:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 266789e7c4be1e00068b16efabd66230 SHA-1: e0c56d15104c625e47ff086bf5ff78619fa32e6e SHA-256: fe877955ce81d6661a4cf399d3814e0ab9281622fc687d71b57dcf30c31a2657
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=attrition+warfare+pdf In PDF document text
    • http://files.aishaiskanderani.com/uploads/1/3/2/6/132695257/8155349.pdfIn PDF document text
    • http://files.coachchoo.com/uploads/1/3/1/3/131378776/tajure_wasatizu_lesigujelivev_wozonajarekani.pdfIn PDF document text
    • http://files.eyerlyarchitecture.com/uploads/1/3/1/3/131380550/8596370.pdfIn PDF document text
    • http://wasejup.jaredbeltfilms.com/uploads/1/3/1/0/131070767/6615cd5a7be5c9.pdfIn PDF document text
    • http://jifogudur.artrageousperformingartscenter.com/uploads/1/3/0/7/130776861/5444861.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/82950730051.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/nenulobiw.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/zajixeja.pdfIn PDF document text
    • https://site-1038999.mozfiles.com/files/1038999/xaxisomowogoxurajokefuf.pdfIn PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/pepuzuvuxawulevavamun.pdfIn PDF document text
    • http://jurip.soupstockfestival.org/uploads/1/3/1/0/131070450/8515391.pdfIn PDF document text
    • http://lavaxag.cuttingedgeschoolcounseling.com/uploads/1/3/1/6/131606492/d6029e36.pdfIn PDF document text
    • http://files.belnacandlecompany.com/uploads/1/3/0/8/130814161/jeguzogunas.pdfIn PDF document text
    • http://fokopo.uplift.ccsdtitle1.org/uploads/1/3/0/7/130776007/mejilemudan.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/c90d61d6-e766-4090-a812-d25785d1590f/71681625965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd035a3-6611-4cc9-bc35-50353eb58c39/rumorisuloxoleko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589403e3-ba7d-4a78-98ac-4c9198f175b4/muxifupanukid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc6757b-7212-4bba-ae2d-ba7cd980ee1b/geretawimubaradidinegefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f72c4f-48e6-4779-8630-618d9028e155/xonerinefidepugovifemep.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_off000081b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 4696 bytes
SHA-256: f777f4f9099d94212e36ffe004577d69e0387c4153c1dee6aab7d7f5bc099944
font_01_sfnt_off000091c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C2 10228 bytes
SHA-256: da3ebd95fd2ea6196a46f9b20f10df4be3728e4435a7e81f6c5d8c2eaece71c8
font_02_sfnt_off0000b468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB468 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378