Malicious PDF — malware analysis report

Static analysis result for SHA-256 984c5a259ce7960b…

MALICIOUS

PDF

64.3 KB Created: 2021-02-14 22:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a8c9961d15a7c3e709858d2e62797f13 SHA-1: 994709dc115fdb3266091ca5ecdccbf5d36cffb7 SHA-256: 984c5a259ce7960b24fd7c6fad4e72899b0d815833c620ff69477d54f6240b76
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'wedding photo background', aiming to trick users into visiting the external URL. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly suggest it's a phishing or downloader document.

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/wb?keyword=wedding%20photo%20background%20hd%20free PDF link annotation
    • https://cdn.sqhk.co/wadupaxi/jf9jejc/black_screen_images_shayari.pdfIn PDF document text
    • http://uscovidcharts.com/92912793336gqmd5.pdfIn PDF document text
    • http://wemexuj.22web.org/75085323930.pdfIn PDF document text
    • http://neuroncraft.online/jidibor54jr.pdfIn PDF document text
    • http://ezfix.asia/93050461931hnhxv.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/Rhiighb/my_dolphin_show_2_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zagebixomibolo.rf.gd/jugivixabaza.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/limits_at_infinity_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/jazemisizikukigetava.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/chocolate_cabinet_transformation_kit_from_rustoleum.pdfIn PDF document text
    • http://jedajokojar.epizy.com/widening_access_scheme_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/isaiah_berlin_historical_inevitability.pdfIn PDF document text
    • http://bapuguxu.rf.gd/26694817873.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/90174775427.pdfIn PDF document text
    • http://danuwujujivujot.rf.gd/fazisovetebo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB591 5304 bytes
SHA-256: 2006bfaf0baca8b8c04d8bf609b7971839c5339b594fd445e10f15040026372e
font_01_sfnt_off0000c795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC795 9036 bytes
SHA-256: d00ce1d5340f7dc1ae67244aa81319a30cb9b5792dcae7cccc30d14a5122975d
font_02_sfnt_off0000e61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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