Malicious PDF — malware analysis report

Static analysis result for SHA-256 33be6e4aa29aef0c…

MALICIOUS

PDF

77.6 KB Created: 2021-03-28 22:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a8f0cebab937babe0e948cd68d73ad SHA-1: d5900b82deb01b5195178f089e49107ef24430bf SHA-256: 33be6e4aa29aef0ca3708dff5c76f127b14afd240dca1ceddd8819fc9f51b3eb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, one of which is directly referenced in the document's metadata, suggesting a lure to external malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=castells+communication+power+pdf
    • https://cdn-cms.f-static.net/uploads/4401692/normal_603c119f8824e.pdf
    • http://mazanatur.space/vikebixutarosibeecl22.pdf
    • https://cdn-cms.f-static.net/uploads/4493916/normal_6055cab283379.pdf
    • http://jokojujut.medianewsonline.com/google_search_history_on_iphone_7.pdf
    • http://soul-felt.com/nevafamipegopopoc3edo.pdf
    • http://kopawaruda.22web.org/washington_post_crossword_answers_march_29_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4480423/normal_5ffb43f5e7e74.pdf
    • http://petersikdar.com/87981142388v7gz6.pdf
    • http://mon-compte-cmb.best/directv_h24-700_manuali9z03.pdf
    • http://koprovk.xyz/flood_risk_assessment_reportiz1lt.pdf
    • http://lasiwefomibew.sportsontheweb.net/zakusifiwekedan.pdf
    • http://sallely.xyz/how_will_you_measure_your_life_harvard_business_reviewvh9gt.pdf
    • http://zedakobogesa.mypressonline.com/bugaxipe.pdf
    • http://ingmijn.com/college_geometry_problems_and_answers18657.pdf
    • http://carins.info/petsafe_dog_training_collar_instructionsl0lb5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kitojob.epizy.com/62543036432.pdf
    • http://kewetanetoza.atwebpages.com/palmistry_basics.pdf
    • http://tumofif.rf.gd/scientific_poster_template_a0_landscape.pdf
    • http://jilubur.rf.gd/50500224682.pdf
    • http://sekovukubetib.epizy.com/poloxulavawafomox.pdf
    • http://dopovis.myartsonline.com/anatomia_ano_rectal.pdf
    • http://ralununajopupe.epizy.com/gafojidinumigumorina.pdf
    • http://pukewideje.epizy.com/random_variables_in_statistics.pdf
    • http://doxixitoxuneb.epizy.com/arthur_conan_doyle_books_bangla.pdf
    • http://bixodog.rf.gd/6887713930.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b0.bin
514f15dc0e4f497621e6d00e9c76a0b8710312b22247924df36bda97b7f7e151
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 5296 bytes
font_01_sfnt_off000103a8.bin
1d8816012449eb0ba661878b9a0b4ed788026304f6cbeaa4591669def978a572
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 11260 bytes