Malicious PDF — malware analysis report

Static analysis result for SHA-256 967cd5dc492f8163…

MALICIOUS

PDF

71.3 KB Created: 2021-03-17 18:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 847318f2e1831b7e6056869b1a452b1b SHA-1: ebe153719a218f5871709bd9feded02927ef354f SHA-256: 967cd5dc492f8163e8e0cf22a2f7068a8be3790f340c0c1a61b5affda842ea09
96 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 an embedded URL pointing to 'dugedepap.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Cbp core values'. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly indicate a malicious intent to redirect the user to a harmful site.

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://dugedepap.ru/strik?utm_term=cbp+core+values PDF link annotation
    • http://mavito.online/persian_imperial_calendar_convertere2oz0.pdfIn PDF document text
    • http://maxist.ru/87578886016htw1h.pdfIn PDF document text
    • http://tokio-2020.fun/325290903215tjpb.pdfIn PDF document text
    • http://naturwow.space/kaboxapudigapu4a7u2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_600cf4e8b0094.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/jjpa4OP/fortress_under_siege_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/ahaWhcs/36298521198.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/hchcegj/33148663540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_601056961021b.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/nuxulikiwab/spotify_premium_mod_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/kosuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70bbd12e-7590-4763-aaba-9852d886a857/13592388272.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/ubuntu_usb_live_creator.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/free_bitdefender_antivirus_plus_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639e4ba6-620f-4cbe-92cf-60b9cbd707db/bosch_axxis_f18_error.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/61169041203.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/nubupegis.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_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 5032 bytes
SHA-256: b988b6ba3d47475403fcc8deedf15ec35a071c66992285f3b14426eb8ede4e7d
font_01_sfnt_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 11096 bytes
SHA-256: a17c31df7072d43a848bd5a5dffa9099620dafcaa47773e45ceaa50d0dc0602e

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