Malicious PDF — malware analysis report

Static analysis result for SHA-256 963f38ad769944ea…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 02:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1f43fae52c591901ff4042fac43b2906 SHA-1: ccebf7f712862b07a9aabc702b1cd6fc58898a3d SHA-256: 963f38ad769944eab0c4c32152acb4692bb4714759be166569ed54562f4f4659
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with at least one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=what+is+the+peter+principle+parkinson%2527s+law PDF link annotation
    • http://uspehdnyaaxyz.xyz/63138121757tcb07.pdfIn PDF document text
    • http://fsbsiod.com/breezer_uptown_8_owners_manual031pg.pdfIn PDF document text
    • http://astropsychology.website/75735571166nqwj5.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/crer_un_compte_explora_parkd4dkx.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/iifpKvT/5810971897.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/ZJhdzwv/teacher_quotes_funny_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/CPcHEif/jizuruvatixur.pdfIn PDF document text
    • http://fruitslope.online/driving_distance_from_athens_to_santoriniqqcfx.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/he5ggQK/dr._vivek_bindra_ibc.pdfIn PDF document text
    • http://dkmz3.club/nova_icse_physics_lab_manual_class_9_solutionsqz291.pdfIn PDF document text
    • http://fivibimotuwar.22web.org/poposedifajagopadudefebet.pdfIn PDF document text
    • https://cdn.sqhk.co/sojejinof/6jdzSQf/the_walking_dead_road_to_survival_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/jcQiaij/photo_finish_horse_racing_promo_code_2020.pdfIn PDF document text
    • http://tazaros.iblogger.org/68655513331.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/lZjjijj/smash_heroes_hypixel_resource_pack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawuzir.epizy.com/management_information_systems_case_study_answers.pdfIn PDF document text
    • http://kukejisagev.epizy.com/animal_sounds_worksheets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 5224 bytes
SHA-256: a884aa578b5e5cbf2dcd3a73577d066ac94da3cef28386e0203385c81feee4bf
font_01_sfnt_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 10556 bytes
SHA-256: eb87cdd2166d4a9e0199749eea71cc17ad500c94020a191ae656ea9fe6f67cf3

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