Malicious PDF — malware analysis report

Static analysis result for SHA-256 7830a17ccb32b4be…

MALICIOUS

PDF

83.4 KB Created: 2021-02-25 19:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 76f14fd6acc40e6749b5b8e88426d127 SHA-1: 217e138e460e31de7eab82fd2b3a75b6bdd56eed SHA-256: 7830a17ccb32b4bee94a3777574bbe9a29b71b11f8c63d1731a9b27e26237626
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded URI pointing to a suspicious domain, 'bologen.ru', which is likely used to host a malicious payload or phishing page. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=perceptual+adaptation+mcat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485809/normal_60242dc62518d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_6003af1890898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467945/normal_5fe3b6aa55b33.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/YhcnOgj/fatipirugis.pdfIn PDF document text
    • http://xavukagidasali.iblogger.org/aplikasi_animasi_bergerak_power_point.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/hgYBehg/60483386367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penale/jovefofem.pdfIn PDF document text
    • http://zufizegemix.epizy.com/briggs_and_stratton_6.75_lawn_mower_air_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/vovetodifoxamopimefopaw.pdfIn PDF document text
    • http://wadekazu.epizy.com/conflict_resolution_styles_questionnaire.pdfIn PDF document text
    • http://vapoborino.rf.gd/12860742409.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/mj5_audition_song.pdfIn PDF document text
    • http://tezafafowajij.epizy.com/jazz_harp_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/fovakopepibiwodexipazu.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/83748272608.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_off00010bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC4 5040 bytes
SHA-256: e4ba33c9824be2a0f5b7e97c82afdfe1e138f937e36c30162926ee573ba7462c
font_01_sfnt_off00011cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD1 10472 bytes
SHA-256: 7d1d08bd99c1dc3eb4e7b431b3e553f14b1095f2d5599f67bf9a4127ad48c9c1