Malicious PDF — malware analysis report

Static analysis result for SHA-256 0444e9ca3a7ae8ed…

MALICIOUS

PDF

106.5 KB Created: 2021-03-22 03:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 99f7ccef5aa278201bc12abb6a60dab1 SHA-1: c10983c9dc9bc485b73704daf19e572606ede909 SHA-256: 0444e9ca3a7ae8edfd71ae3857ed128d64b56395622075309acecbc2e3e18e7f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also flagged it with high confidence. The presence of multiple unknown URLs suggests a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure and embedded URI indicate a likely attempt to deliver a malicious payload.

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://jacksth.ru/strik?utm_term=au+aw+worksheets+pdf PDF link annotation
    • https://cdn.sqhk.co/bikulatitaxe/ih4PVgd/android_api_27.pdfIn PDF document text
    • http://axecheat6.xyz/7708517144udvxy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_5fd1fb14dfeea.pdfIn PDF document text
    • http://lessonsonline.site/xukizazijorajicco2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_60570bd545740.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/Xhchcih/modern_warfare_warzone_pc_download_size.pdfIn PDF document text
    • http://trysoda.pro/final_fantasy_x-2_strategy_guidees54d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fc8c1bd78323.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/glxKcbD/costco_callaway_golf_balls_review.pdfIn PDF document text
    • http://hookup757.fun/napajomonodotiveja2ozl5.pdfIn PDF document text
    • http://am-sound.ru/unifi_uap-_ac-_lr_softwareifwbv.pdfIn PDF document text
    • https://cdn.sqhk.co/lotuwuzu/jj4PdbN/kuganamugixasamujedodomap.pdfIn PDF document text
    • http://procripton.com/a_level_biology_zimsec_past_exam_papers4orrd.pdfIn PDF document text
    • http://laithub.pro/jidenajalotimejupederonamlnat6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_6054826ae61a7.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/feborobegibew/671597345.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/how_much_do_crime_investigators_make.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/how_to_make_a_on_ipad_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/51592494945.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/dusazisosixeb.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_off00015b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B38 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off00016532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16532 5240 bytes
SHA-256: 6db9ecd1312d6f511286e6d4bceb2f4b5bbfe3ebbf9076a95c4c1d7ccc80f11c
font_02_sfnt_off00017719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17719 10140 bytes
SHA-256: b9defd8b660c2d807d3ce42f461915ebe04c4aa17fadc1a65c2bc579c66b3531

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