Malicious PDF — malware analysis report

Static analysis result for SHA-256 c264efa4dce1b4fd…

MALICIOUS

PDF

75.4 KB Created: 2021-02-26 16:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6157986ffcf72415026275a073001fb6 SHA-1: 2a735073c2240a29683e132b21acef2de287a5b5 SHA-256: c264efa4dce1b4fd763f5511daa0a89ebf53900451ff3ad33db1d8340c2d0a88
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a deceptive lure related to a common search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+many+tablespoons+of+dunkin+donuts+coffee+for+10+cups PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392668/normal_600818353db86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468828/normal_601845314ae17.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/ghgxo8d/8096535613.pdfIn PDF document text
    • http://nuzidixiwetor.22web.org/5913458598.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/gjah4C0/79687497607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd1d74a07c89.pdfIn PDF document text
    • https://cdn.sqhk.co/junuxuseg/tvhilBg/4193582074.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/kenorerad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483359/normal_5fe48ec577955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_602defa41e206.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/gizhbhb/flappy_bird_killed_brother.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417526/normal_5ff14068eef35.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
    • https://s3.amazonaws.com/tetofamuxulil/fofewobidevozakipuwovu.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/72158013904.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/calculator_photo_video_hide_app.pdfIn PDF document text
    • http://bexufomadixin.rf.gd/7033785727.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/4001791753.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/itv_news_meridian_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/32529027573.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/shri_ram_amritvani_audio.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_off0000da77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA77 5736 bytes
SHA-256: 7b622f5c55a5a104b345d3225ddd007851529b16286bc5e155c7abc67c33032e
font_01_sfnt_off0000edef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEF 10488 bytes
SHA-256: adba0c49e03fdb0f3a9b7946d212fdbd19710f9653adcb008203df57603c38a2
font_02_sfnt_off000111e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2