Malicious PDF — malware analysis report

Static analysis result for SHA-256 370b43e89f84ae5c…

MALICIOUS

PDF

83.3 KB Created: 2021-04-05 06:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6223b534d87ebd20e4d80a0d72e2566d SHA-1: d72d386fef4ee73a01f3cf7b45946cf28df69898 SHA-256: 370b43e89f84ae5c68fbd7675f67a31f523215eb5a50bf0851b17d6dcde09d64
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=world+series+of+poker+apk PDF link annotation
    • https://cdn.sqhk.co/jegamaxegev/wqgfhgs/53744191895.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/ii11jeR/the_walking_dead_season_10_midseason_finale_date.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/bhopal_gas_leak_disaster_act_1985.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/103049777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487903/normal_60129b3d6aa8a.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/hhhfeBp/guide_for_cod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5fd8403f55c1d.pdfIn PDF document text
    • http://mokuduvejevuz.scienceontheweb.net/26862866907.pdfIn PDF document text
    • https://cdn.sqhk.co/zutomina/hdLLIhc/valijatebizirukazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_602cef7135cf6.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/0tjblqF/craig_road_animal_hospital_staff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_6019f759677e6.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/robin_hood_2010_christian_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_6021bdbaf1ba5.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/higcjiy/liguwe.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/Zvjjjh3/cci_paris_formation_agent_immobilier.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupuxus/ford_econoline_service_reset.pdfIn PDF document text
    • http://botiditab.rf.gd/company_law_introduction.pdfIn PDF document text
    • http://nazijomibak.epizy.com/tojofojiduxi.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/80784383124.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/suddenlink_outage_report_number.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/xugawedukobedav.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_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 5112 bytes
SHA-256: 1eee401750c90659bcb592fcaeb3bbb4bc90fe34354b93555e84129806b6f18a
font_01_sfnt_off00011b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B81 10616 bytes
SHA-256: bf35c4d2b98aef373122dcfdf14d7ca2a9d99199c7ce5644aa4517d29f9b96e1

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