Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f943dbdad956064…

MALICIOUS

PDF

80.4 KB Created: 2021-03-10 02:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f135c42882be6861d28d720443ce8c8 SHA-1: d70d74007be368f036651c2b7337ffa2d8aa58fb SHA-256: 1f943dbdad9560644d940c7bef5c3b47679bd75eed796b32ad09669e7ff0c53c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Phishing.Trojan. The embedded URL and document body suggest a lure to download content, likely leading to further malicious activity. The file's purpose appears to be a phishing attempt disguised as a document download.

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://zajinet.ru/award?keyword=pathophysiology+ivan+damjanov+pdf+free+download
    • https://cdn.sqhk.co/towafeniruje/3upjbge/62151575135.pdf
    • http://xuridikak.22web.org/gifuderuxelorusarupojok.pdf
    • http://xalebiru.iblogger.org/84692313368.pdf
    • https://cdn-cms.f-static.net/uploads/4483842/normal_601dbc7e4bac8.pdf
    • https://cdn-cms.f-static.net/uploads/4402720/normal_6023d80118c43.pdf
    • https://cdn.sqhk.co/muditazu/Hhaidjg/trenches_of_europe_3_mod_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4409113/normal_6047f2e5a7b02.pdf
    • https://cdn-cms.f-static.net/uploads/4500417/normal_603d98d213173.pdf
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5ffb11cf31430.pdf
    • https://cdn.sqhk.co/sofizagumup/aZifBlv/mobile_passport_vs_global_entry.pdf
    • https://cdn.sqhk.co/rorezina/AL2hjf6/marvel_contest_of_champions_forum_deutsch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_54a513a5056549e3917fbd96bce15f89.pdf?index=true
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_351c72e962d34c65a0e796e75f06721f.pdf?index=true
    • https://s3.amazonaws.com/lomiwexuva/rezalejevu.pdf
    • https://uploads.strikinglycdn.com/files/971b7eae-082b-4c10-9862-1d1160d88cfc/84524499751.pdf
    • https://s3.amazonaws.com/sixenogafopoj/23127379056.pdf
    • https://uploads.strikinglycdn.com/files/f77a4b2a-00b3-404c-adbb-5732179471e3/62442439370.pdf
    • https://s3.amazonaws.com/vapite/76664605203.pdf
    • https://s3.amazonaws.com/vapelurowar/hand_held_circular_saw_with_laser_guide.pdf
    • http://dagaratula.rf.gd/juxepatupuxulet.pdf
    • https://s3.amazonaws.com/tigewibejageju/28652714057.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_off0000fc6d.bin
ceed3ff10206c1c0505dc5a5ec9187bffea7fbed2a39a2f299d4353ac994bcfa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 5788 bytes
font_01_sfnt_off00011013.bin
b892deedd25ab4508f8d5c5274b079dc434e9d41ee516db46c02801d64be2be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11013 10544 bytes