Malicious PDF — malware analysis report

Static analysis result for SHA-256 346155399db69432…

MALICIOUS

PDF

86.6 KB Created: 2021-03-08 17:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cea8b4c4c6878c237e862be08ceb6721 SHA-1: b656d8aa0cc139e686ab0c4d905a785a67a8967f SHA-256: 346155399db69432c979601649a9d4766f8bf1cd38b6b53e0152190863d9ea14
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external sites, suggesting a link farm or phishing lure. The document body, though partially garbled, indicates a deceptive title related to 'Doen a de chagas pdf', likely to trick users into opening and interacting with the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/award?keyword=doen%25C3%25A7a+de+chagas+pdf PDF link annotation
    • https://cdn.sqhk.co/zowolanazew/eAq6Sgi/susogetosebur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_5fe07f4ae4688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_6026b4dbcea78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fe8f568c63da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_600caae5b2f21.pdfIn PDF document text
    • http://tesar-krd.ru/dungeon_knight_oculus_questb8tmc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_602e551c13ca9.pdfIn PDF document text
    • http://delayikapy.xyz/72912955101k5kjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_603499178824e.pdfIn PDF document text
    • http://runmasten.online/teketufowuwudakeso4knol.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/0qjehg0/98560566119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461516/normal_5fcda1e258f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_5fe77a4dd6fdb.pdfIn PDF document text
    • http://50offit.pro/math_worksheets_story_problems_for_2nd_grade4emnc.pdfIn PDF document text
    • http://lidlid.xyz/dobutevurotufutafurgqutf.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/a87abf4b-a500-4e46-9b80-28290d2095a0/77963773901.pdfIn PDF document text
    • http://xikisefux.epizy.com/senifonovixotowabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf1e49e-d837-4973-9a3d-60d6893eeb0c/pigadugotebebiramo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4e5eeb-eead-4821-9c19-f6f298537794/presupuesto_de_inversion_de_capital_caracteristicas.pdfIn PDF document text
    • http://purowubiwebig.epizy.com/craftsman_19.2_circular_saw_blade_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f384c2e0-2bd1-4866-ad99-43e689e33e50/how_to_make_mental_calculations_faster.pdfIn PDF document text
    • http://likasiz.epizy.com/bruno_major_easily_sheet_music.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_off00011111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11111 5468 bytes
SHA-256: 1bb74668030b5f74493b2d82b24559511d21af14ec5dc22192d72504cb9d4f81
font_01_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 13320 bytes
SHA-256: 718f594d9d5f1b7d9531540c0244d07fe9fa114a75588b259768a439e97dcda3

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