Malicious PDF — malware analysis report

Static analysis result for SHA-256 7103899cc4152f4e…

MALICIOUS

PDF

67.0 KB Created: 2021-04-10 22:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3db746dc763d6f8684d7ccffcc605d71 SHA-1: e1e33a4b3526fc211c6de56b33e98c548c3f3f9e SHA-256: 7103899cc4152f4efd53cf4a18c1cadb73a4db6babc119d7d19f2a99d529cffc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for malicious purposes. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to trick the user into navigating to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=ktm+owners+manual PDF link annotation
    • https://cdn.sqhk.co/zudilubal/i9ifiif/non_travel_bucket_list_ideas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451561/normal_60091292dcec9.pdfIn PDF document text
    • https://cdn.sqhk.co/livoluxuwad/dhcgvjf/shoot_em_up_full_movie_streaming.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_606a1c7fd585d.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/efF1jic/lelubujalijapuligewutu.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/resisuna/microsoft_net_framework_4._6_filehippo.pdfIn PDF document text
    • http://keporumutiwem.epizy.com/google_sheet_turn_on_offline_sync.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/dun_bradstreet_credit_reporting_agencies_australia.pdfIn PDF document text
    • http://laxiruzeremifam.rf.gd/tebuturobebadasuxufe.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/venowo.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/75301932642.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/iowa_football_schedule_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/what_does_e3_mean_on_a_samsung_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/information_about_chandrayaan_2_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/babu_bangaram_songs_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/internet_speed_meter_app_for_pc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 4892 bytes
SHA-256: 08121ef195cb660b870d61825004a1045a16558377eb797121bda32f90c37d31
font_01_sfnt_off0000dc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 10244 bytes
SHA-256: e37cd14ab5ab236986ad8c99cba654212deadafbabb44b1fd43ebcb4c8a5788c

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