Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cca2ecd855807d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-25 14:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3ef488931e0387162db6bf848db731be SHA-1: 67f1e04a3d037f7ae94e5636c804ea5258ba3326 SHA-256: 77cca2ecd855807de611d636f03a4b192afdd9ab68ae7e28b65160499070b7ba
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=how+to+connect+onkyo+remote+to+receiver PDF link annotation
    • http://migerov.xyz/6579673895bi8tm.pdfIn PDF document text
    • https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/7e9de.pdfIn PDF document text
    • http://gradstroy.su/juligevusuw35n5.pdfIn PDF document text
    • http://maturibcgj.space/whereer_you_walk_sheet_musicljou4.pdfIn PDF document text
    • http://senteber.site/para_que_se_utiliza_el_cianuro_de_potasioyd8b7.pdfIn PDF document text
    • http://nasty666.space/xefazazemutekosurupaselejy30u.pdfIn PDF document text
    • http://ptmonline.ru/crack_abbyy_finereader_14k2my5.pdfIn PDF document text
    • https://noripuluse.weebly.com/uploads/1/3/5/9/135957130/4116189.pdfIn PDF document text
    • http://formblckr1.xyz/barbie_christmas_carol_dolls5a15.pdfIn PDF document text
    • https://numetigovav.weebly.com/uploads/1/3/1/6/131606493/624f1a6f.pdfIn PDF document text
    • https://mirenixumevi.weebly.com/uploads/1/3/5/3/135309561/sodusutukipexop.pdfIn PDF document text
    • http://rcasino.info/tabifagizaminop60z2.pdfIn PDF document text
    • http://mastericy-chistoty.ru/dakonudifuoiw.pdfIn PDF document text
    • http://card2card.live/dual_enrollment_georgia_deadline3d0x4.pdfIn PDF document text
    • http://detonicufficiale.website/91373068580cuobe.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/b5c22daa-aed6-47ed-a6bc-abb1b3afb6a0/beginners_guide_to_sketchup.pdfIn PDF document text
    • http://mebukaronov.epizy.com/6323555717.pdfIn PDF document text
    • http://nomekerileme.epizy.com/10862682287.pdfIn PDF document text
    • http://radavukekugam.epizy.com/aminocidos_essenciais_e_no_essenciais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e585cea4-fb67-45a1-9783-019f81f796de/simijuvaribajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe8b909-3cce-40d9-9bea-2e42fa57bd08/sims_3_custom_worlds_download.pdfIn PDF document text
    • http://gepuwuvezu.epizy.com/51532986962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f5a26e-b566-43b2-a8fe-2fc088bff58b/the_world_of_the_dark_crystal_documentary.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_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 4804 bytes
SHA-256: cbbd23d57ac55f7b52f193e06fb9128c73a69e5dc83536f3db59c4e3d5c3b8af
font_01_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 10888 bytes
SHA-256: 9a7f35f0944387cf002b08c803afba5a96c13e1fb7ef575f59043f09c6822d05

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