Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf83501ce0cf8006…

MALICIOUS

PDF

70.9 KB Created: 2021-02-23 21:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3b4ae0a683cd6a463488c832ae2e035 SHA-1: 931d58b55d4784abb4dbd6b3704499b8648172e6 SHA-256: bf83501ce0cf8006cebe605a1bf50448be4c38ae46f9fcf459fa2dc315e736a9
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating high maliciousness. The document body, though partially corrupted, contains text related to router issues, suggesting a phishing or social engineering lure. An external URI pointing to 'druttle.ru' was extracted, which is likely part of the malicious payload delivery or phishing infrastructure.

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://druttle.ru/123?utm_term=why+is+my+router+flashing+red PDF link annotation
    • http://czecheducation.space/50588774346rfrey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5fda14ff6c22e.pdfIn PDF document text
    • http://vumavotanumibuv.iblogger.org/rusemakurodikux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495536/normal_5fcda9d23151e.pdfIn PDF document text
    • http://gomotejux.iblogger.org/80865240322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446174/normal_5fedf9888de1f.pdfIn PDF document text
    • http://beruvutekimeged.22web.org/mozilla_crash_reporter_l_g.pdfIn PDF document text
    • http://metalllift.ru/software_architecture_document_templatelx5hf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5fc57692d1df4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5ff3035432930.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/carbothane_134_hs_product_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/9ndgc9S/lymphatics_of_lower_limb_ppt.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/dazutun/fgo_halloween_2019_challenge_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/aduro_dash_cam_manual.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/diablo_3_season_15_leveling_guide.pdfIn PDF document text
    • http://fupuvomevo.rf.gd/94314747505.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/82197154030.pdfIn PDF document text
    • http://kafokenenore.rf.gd/toludakupozevi.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_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 5436 bytes
SHA-256: b69fcda0822d028e218048c3436dce42b437ab061ea5611360334237b054257a
font_01_sfnt_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 10840 bytes
SHA-256: e3054d6c4ec66550a2d9e90decac7a94cae6fef52910b485c04e8f10285a4b54

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