Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c31b0647f1c5796…

MALICIOUS

PDF

77.4 KB Created: 2021-04-05 10:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dd9862250b7bf6b59228769db52f131f SHA-1: eb41897955c331d58cab403285ae0c533b6fad68 SHA-256: 6c31b0647f1c57965079edfa0b022d0c2c16fadfd31c67d0de4123268bdee9f0
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF's structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/123?utm_term=blood+type+genetics+problems+and+answers PDF link annotation
    • https://cdn.sqhk.co/riwewazisara/jhxjjgj/neon_pokemon_wallpaper_hd_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wituwuxevef/fijlMje/ionic_bond_vs_covalent_bond_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/HNficp2/ben_10_alien_swarm_fighting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/terexugureto/nidajgI/samsung_accessory_service_apk_mirror.pdfIn PDF document text
    • http://pupezito.iblogger.org/6th_grade_reading_passage.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/zQRIqjf/rufizawiput.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/qidghii/flo_health_period_tracker._my_ovulation_calendar.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/i0EhgiP/snow_bros_2_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/gcjdKIu/5246060041.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/Shijdhf/zadeboka.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/cjehbFa/54193989615.pdfIn PDF document text
    • http://guketaz.iblogger.org/schneider_electric_vfd_atv312hu15n4_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/iUhhfgc/a_robertsonian_translocation_is_considered_non-_reciprocal.pdfIn PDF document text
    • http://xevalarebufop.22web.org/ruwipiredaz.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/jgpD9gc/ultimate_motorcycle_simulator_mod_apk_download_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/027f4af9-7f1e-4262-8038-102e97282d38/how_much_do_foster_parents_get_paid_in_wv.pdfIn PDF document text
    • http://favebabusapador.rf.gd/64035890604.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/game_maker_studio_2_download.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/malayalam_movies_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a53e51-3b24-48c9-b04f-e66b9a540cdb/87337935493.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/anybody_can_dance_songs_in_telugu.pdfIn PDF document text
    • http://watotiwima.rf.gd/4_pics_1_word_level_2118_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/hse_risk_assessment_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/27315218223.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_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 5776 bytes
SHA-256: 1b7ec2f0a22e0a6237caf8ce7f31afd4758ee07dc0926826354b144f1349bf6c
font_01_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 10648 bytes
SHA-256: 0e0c861c1c4768435ae8d17e6f67d210547745e9c7c113d5718d13a43565ce98

Open this report in the interactive analyzer, or submit your own file for analysis.