Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad7b4ea31ea4aa6…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 09:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5636a00900449a2d7f746eacc7deefbb SHA-1: 389f9ab4b3be587f6155857de5df3384ca678962 SHA-256: 2ad7b4ea31ea4aa6ed5546b68c172937a2a31d886074f6e58458b8d92c9f5bab
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as an external URI pointing to 'https://gimoguvi.ru/award?keyword=agregados+economicos+pdf'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/award?keyword=agregados+economicos+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469834/normal_6054c84c53f36.pdfIn PDF document text
    • http://rutidewebatodug.iblogger.org/biblia_ortodoxa.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/fed344b8.pdfIn PDF document text
    • http://katatiboxenosov.iblogger.org/d_d_basic_set_1983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_604620cc62b28.pdfIn PDF document text
    • https://semowonobepak.weebly.com/uploads/1/3/4/2/134235862/sisipufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5fff28c1df357.pdfIn PDF document text
    • https://gezepisazijite.weebly.com/uploads/1/3/4/7/134769425/gomunafu_vafunufinuwale_riwani_nipijiwasep.pdfIn PDF document text
    • http://zapemik.iblogger.org/get_minister_license_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481411/normal_60451e7214111.pdfIn PDF document text
    • https://vusujotogeza.weebly.com/uploads/1/3/4/6/134653296/fibozadas_derevamax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469135/normal_5feb8824d852d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_60552116ed4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_602331dc01791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_60464139950f4.pdfIn PDF document text
    • https://pibenefalax.weebly.com/uploads/1/3/4/0/134019612/bisugagabot_futukavumiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_60236dbea8947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_6003b2e4af300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piserujirabubam.epizy.com/10689408646.pdfIn PDF document text
    • http://gigupagupefexo.epizy.com/wayne_dalton_idrive_garage_door_opener_for_sale.pdfIn PDF document text
    • http://lekedoxe.rf.gd/97564921516.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/nikutawidokodenaruzolaxo.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_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 5432 bytes
SHA-256: 9877955221c55320e03d6125d89c6b64d47e7a56ba1341265d051444e060c1cf
font_01_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 12232 bytes
SHA-256: 016c7e0c4d088d4496a3177966c0e6842230d120008f99a513254631b4149bef

Open this report in the interactive analyzer, or submit your own file for analysis.