Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dc8a64ac6c253c…

MALICIOUS

PDF

75.0 KB Created: 2021-06-09 16:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3692502ba2033489a23fc9218cc1a4df SHA-1: 40172cdb9f5c0fd723b5989ec4e3259d326270e0 SHA-256: f6dc8a64ac6c253c9fab17a99d3cae936de8c998cec95f229e5bd816cb9c4103
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of external URIs and the overall structure point towards an attempt to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://garglob.ru/pbw?utm_term=free+logo+animation+presets+after+effects PDF link annotation
    • https://zagesugob.weebly.com/uploads/1/3/4/3/134379314/79323093f9ce4.pdfIn PDF document text
    • https://tolopexe.weebly.com/uploads/1/3/1/0/131070113/eed58cd9dd1bfd.pdfIn PDF document text
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/8092093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_606d9814445c9.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/visilolinix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_6021713cb22e7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4462730/normal_60aff0e77f497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374983/normal_5ffe89ffa3d4e.pdfIn PDF document text
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/8662733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatojorisa.pbworks.com/f/exerccios_adjunto_adnominal_e_adjunto_adverbial_com_gabarito.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144562266/tour_of_the_electromagnetic_spectrum_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c155a7-e1fe-46a4-af0f-360eefb544c9/planet_minecraft_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b71834-783d-40db-bffd-bbaf33d4af02/can_vocal_tics_go_away.pdfIn PDF document text
    • http://mojuseraneno.pbworks.com/f/how_to_reset_liftmaster_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72d1776-ecb1-4cf4-abf9-6ee429e136fb/what_is_the_meaning_of_communist_manifesto.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/derizozotakoxufudifuzir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56a5f42-6d83-4379-9b1b-f09a604b8121/crock_pot_smart_pot_replacement_lid_model_scvc604.pdfIn PDF document text
    • http://botinuba.pbworks.com/f/machinist_hammer_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6847f5-1344-4199-9631-662ee65eeb8d/98565825798.pdfIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144518964/wondershare_filmora_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59d6e25-8076-4161-8cc5-38ef2a352219/vuxip.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144955713/81120509934.pdfIn PDF document text
    • http://divogatupum.pbworks.com/w/file/fetch/144776817/pre_employment_background_check_authorization_form_florida.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_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 5288 bytes
SHA-256: 02a684a9c15290096dcf76466552fbae92809f6333185ff3a6e991ad76ac60ee
font_01_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 10248 bytes
SHA-256: a0674dfc89cfa7a01ed6e7d117704fc34abf274a254d96417a573e8ebfdb9a10