Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9f787560494985…

MALICIOUS

PDF

76.9 KB Created: 2021-03-20 03:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4c7ee1ace3e7202dca470e5aa09023ec SHA-1: cd03a10ebb62f4bbeb46e7f583aa0de9c30794f2 SHA-256: aa9f78756049498534fe0e023097a08f27d03259b1e16f07c29408403e7d5bfd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document is detected as malicious by ML classifiers and ClamAV, indicating a phishing and trojan payload delivery attempt. It contains numerous embedded links, with at least one pointing to a suspicious domain, likely serving as a lure for users to download further malware. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct users to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/strik?utm_term=nutrition+care+manual+price PDF link annotation
    • http://tuduvodakep.mypressonline.com/40788647895.pdfIn PDF document text
    • http://roskycnmx.com/craftsman_18_gauge_brad_nailer_repair_kitrbrxc.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/meralgia_paresthetica_patient_information.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/25636866150.pdfIn PDF document text
    • http://hellesypakk.online/86125873786dxx1v.pdfIn PDF document text
    • https://cdn.sqhk.co/rujopupomob/cFicar0/captions_for_girls.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/QibooNg/82136373600.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/57189824988.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/ZB8WmF4/50803819277.pdfIn PDF document text
    • http://cpskras.website/hashtags_for_youtube_gaming_videol9tvt.pdfIn PDF document text
    • http://nout-prodat.site/zaginopekinopuxuropamn4eea.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/cznyig3/idle_air_control_valve_price_philippines.pdfIn PDF document text
    • http://paktum.pro/how_to_do_step_4_in_al_anon64pbd.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/Cih7Khe/gemoduwuxivasuxof.pdfIn PDF document text
    • http://bitoxifa.sportsontheweb.net/biology_csec_syllabus_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xijisunuma.rf.gd/how_to_clean_filter_on_whirlpool_cabrio_washing_machine.pdfIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_47db2b5979bb4d82bf6059b55e59b313.pdf?index=trueIn PDF document text
    • http://ziwemasux.myartsonline.com/wellness_wheel_activity_online.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/craftsman_garage_door_decorative_hardware.pdfIn PDF document text
    • http://fopogovokikav.rf.gd/how_to_draw_easy_nature.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_69c83261404f4336945bb377a84eae2a.pdf?index=trueIn PDF document text
    • http://fonajuwowo.epizy.com/pewurilarax.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/xukobepotuvazipa.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_303b9cdcfefe495ca628985b51ab1644.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_1bde1afa0f2243a49896bb2380e78d1c.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_4d6ca48245ec48c8ac8e863a948932da.pdf?index=trueIn PDF document text
    • http://domuromu.atwebpages.com/84558657692.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_off0000eea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA7 4872 bytes
SHA-256: f3e328ae862a886f20bd47ea9bcbf5975df3e7054818480f05f58c951302ea8c
font_01_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 11440 bytes
SHA-256: aa8f4e4fc7ff16407d084296c332b56510cd1cc568ed3da5ca0841b0345602d5

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