Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cee3b017fc99f4d…

MALICIOUS

PDF

78.6 KB Created: 2021-05-09 23:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bdb521eb140f320d72fa9f5f6437cdf2 SHA-1: 217414546ab1edd0317a6f12e40431c6324ff171 SHA-256: 7cee3b017fc99f4d2e7c260e9a02b628ecf1afd6b32acd31869a58e3d49957ce
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed to obscure the final destination. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL identified is https://seumenha.ru/strik?utm_term=panasonic+microwave+repair+service, which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=panasonic+microwave+repair+service PDF link annotation
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/nitinezi-lukozej.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/ammeter_voltmeter_wattmeter.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/pomotiwara_tujatexa.pdfIn PDF document text
    • http://bioforcecolumbia.site/why_is_authentic_assessment_important_in_early_childhood_educationvb8ql.pdfIn PDF document text
    • http://alisabor.design/98442451513ih8o4.pdfIn PDF document text
    • https://madajeguruxe.weebly.com/uploads/1/3/4/3/134348767/5137286.pdfIn PDF document text
    • https://womafikuv.weebly.com/uploads/1/3/4/6/134668976/zexituguwoti.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/98185493463.pdfIn PDF document text
    • http://viziziziv.mywebcommunity.org/banting_meal_plan_for_beginners.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/938adda.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/9c38d151-3314-4f6b-9ebc-923c00466e32/a_shepherd_looks_at_psalm_23_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/kathi_bgm_songs_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/total_coliform_water_test.pdfIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/ejercicios_present_perfect_still_yet_already.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/how_to_block_calls_on_vtech_cs6829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc3794f-3f29-4db4-a576-db6dedc606fe/wuwevelosijosekovivegaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9711e8f4-c65f-4f1a-8c34-220dd861c7b4/life_hacks_book_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/devilbiss_air_compressor_pump_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f407461f-f1a0-4e0e-8ee1-5328aeb7c737/1969244478.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/vunimegilaje.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_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 5200 bytes
SHA-256: 9339664fe26d27bcff914183b6932faa32dcf8845ffb0e12eae17c9baee29b16
font_01_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 11900 bytes
SHA-256: 4d9edc65386cf30f0aecd636d6aa8cfbf59b6db733d6905c53fac065303dd83a

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