Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f3fc23b753f4a1…

MALICIOUS

PDF

71.8 KB Created: 2021-03-25 06:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9015fb6887e29722dd4fed1e5aaa9acd SHA-1: 5b17f1182de5ce1b892b6ff9fa68c41876171c95 SHA-256: d8f3fc23b753f4a15151df5e4b713fef580c5e90f22bec41788ede1f56ed972f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness, and the document's content, though heavily obfuscated, appears to be a lure for external websites. The presence of multiple external URIs and the link farm heuristic suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • 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://bologen.ru/wix?keyword=troubleshooting+for+sony+bravia+tv PDF link annotation
    • http://lemiritafuwab.22web.org/pizijafazisutawulor.pdfIn PDF document text
    • http://joxutodotuwosej.22web.org/labun.pdfIn PDF document text
    • http://tadukesavexufe.22web.org/76860524784.pdfIn PDF document text
    • http://gunenekaroz.mypressonline.com/73994218805.pdfIn PDF document text
    • http://surerup.22web.org/ammonium_oxalate_msds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_601a1c756667b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5fdc983421696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6056d388b497f.pdfIn PDF document text
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/2020289.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/gipepefejero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414867/normal_5ffbe79e06624.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/reviwiraropenezarutawe.pdfIn PDF document text
    • http://suzolovopu.iblogger.org/how_to_unlock_my_hotpoint_washing_machine_door.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/adfb0848ea9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5ff340cb95714.pdfIn PDF document text
    • http://jutamokotodoto.iblogger.org/cyberpunk_2077_gameplay_leak_today.pdfIn PDF document text
    • https://nufomesamibu.weebly.com/uploads/1/3/5/3/135332564/nokeguxidaruju-mozibepaposane-tufulikewiruri-lukuki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mabibetajekujap.rf.gd/math_book_grade_11.pdfIn PDF document text
    • http://tonezifimoraga.epizy.com/converse_plateadas_plataforma_altas.pdfIn PDF document text
    • http://dunixojojulif.epizy.com/sears_garage_door_opener_battery_size.pdfIn PDF document text
    • http://pisironebininuw.rf.gd/third_party_logistics_contract_template.pdfIn PDF document text
    • http://vamudijikepefos.rf.gd/61182871968.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/les_pays_du_monde_et_leurs_capitales_par_continent.pdfIn PDF document text
    • http://wugoxoduzon.epizy.com/14879049920.pdfIn PDF document text
    • http://jodetiwozefiso.epizy.com/keanekaragaman_agama_di_indonesia.pdfIn PDF document text
    • http://fenubamijub.epizy.com/bumblebee_car_wallpaper.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/kokeza.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_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 5280 bytes
SHA-256: 919bf17449545fbe75c2c1672b2a621e0c381da8d29b33f705d7c4f25b31d73d
font_01_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 10520 bytes
SHA-256: 134201fb4b8437b7ac69d1b8b9e2d43e123d5b4d4971afda57a1bc3b4ca05636

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