Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bacd077c7a88dd…

MALICIOUS

PDF

78.2 KB Created: 2021-04-27 10:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eda0816f16056bd8dd958249f241f9d6 SHA-1: 203e4278f0ce0652af3b6da80eeacc4189ef66a1 SHA-256: 19bacd077c7a88dd8ff0fcc5a2f151bf36bf8accf8046137c8528ea58577780f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by both ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to a common technical problem, likely intended to trick the user into visiting the malicious URL. No scripts were extracted, but the presence of a malicious URL and the ML/AV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dafemum.ru/strik?utm_term=why+is+my+keurig+not+brewing+a+full+cup
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6035310da686e.pdf
    • https://static.s123-cdn-static.com/uploads/4405206/normal_600922e2ae78e.pdf
    • https://static.s123-cdn-static.com/uploads/4419452/normal_5ffce2676cf62.pdf
    • https://cdn-cms.f-static.net/uploads/4418993/normal_6051c3a9825cf.pdf
    • https://cdn-cms.f-static.net/uploads/4366381/normal_6009d62184394.pdf
    • https://cdn-cms.f-static.net/uploads/4469119/normal_605bf1c7acbbf.pdf
    • https://cdn-cms.f-static.net/uploads/4449410/normal_6055b4f315865.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0bddf25a-c79c-4d0c-a657-3caafeff1a2a/why_is_my_washing_machine_smelling_musty.pdf
    • http://firosuvidafodi.rf.gd/buwonakakugetuxugu.pdf
    • http://pewulalabes.epizy.com/fikujexawokaxexotedob.pdf
    • https://s3.amazonaws.com/voropa/lord_of_the_rings_book_review_reddit.pdf
    • https://s3.amazonaws.com/wamatasamegu/gakomar.pdf
    • https://s3.amazonaws.com/xeruxaxer/begufixamomaku.pdf
    • https://s3.amazonaws.com/gizonukorad/resea_de_la_pelicula_diarios_de_motocicleta.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/semumupabif.pdf
    • https://uploads.strikinglycdn.com/files/c7993da2-3721-4bbd-96e3-c01da3f7b204/sutuxizepoteneruvevenugof.pdf
    • https://s3.amazonaws.com/makixibawumebol/sakhi_tamil_movie_songs_free.pdf
    • https://s3.amazonaws.com/sevoga/mehandi_circus_tamil_movie_ringtone.pdf
    • https://s3.amazonaws.com/batoragubukepo/when_did_japan_withdraw_from_the_league_of_nations.pdf
    • https://s3.amazonaws.com/dazuxujepov/what_is_thermal_processing_techniques.pdf
    • https://uploads.strikinglycdn.com/files/1eec2b11-1e0c-40d0-b3b8-528f6022c17a/how_to_reset_jbl_soundbar_3.1.pdf
    • https://uploads.strikinglycdn.com/files/7ef191b4-6e42-4179-8d22-752edff2a5fa/zawizesa.pdf
    • http://pesabumurusese.epizy.com/toccata_und_fuge_d_moll_bwv_565_noten.pdf
    • https://s3.amazonaws.com/xebuvuwov/expository_writing_topics_for_middle_school.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_off0000f297.bin
a3c88fb67a6cb0774e17ae17f01f600abfbef62d35777731ce876818c1b3f2da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 5840 bytes
font_01_sfnt_off00010676.bin
2b889e0f08412273722569cbd6a023a2da044b054c3635a2cfed0d8bb2d86ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 10756 bytes

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