Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7df20e3dd607fc…

MALICIOUS

PDF

75.3 KB Created: 2021-02-20 19:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7f180403277bd53e53eb809704ace48f SHA-1: 982a499d4e2133cf30cc2c365da6b27c12038e4d SHA-256: 0d7df20e3dd607fc4a0c0170cb426109a35a2826b55a0e197d14664fdcaf88eb
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=snaptube+apk+download+2016+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375204/normal_601a8454671cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447912/normal_5ff98b4569b44.pdfIn PDF document text
    • http://obschee.xyz/asuhan_keperawatan_gastroenteritis_akut2bwkg.pdfIn PDF document text
    • http://kisedevobale.22web.org/google_adwords_certification_questions_and_answers_2018.pdfIn PDF document text
    • http://static-start.top/71996178483ds1zl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_600697dbce79f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_601da4b1a9352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_600b791914b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_600ceb4181d65.pdfIn PDF document text
    • http://cookwellbakewell.com/wow_affliction_warlock_pve_guideuv7xz.pdfIn PDF document text
    • http://fewemika.66ghz.com/sudelujuwoxotojokesifepet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481156/normal_5ffb24a1cc0b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luxogigir.rf.gd/wotokoz.pdfIn PDF document text
    • http://degejukifukux.epizy.com/2574347506.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/fewokalozelanuru.pdfIn PDF document text
    • http://jorixoxogud.epizy.com/the_hunger_games_movie_download_in_tamilrockers.pdfIn PDF document text
    • http://gafomawonerif.rf.gd/are_gluten_free_products_suitable_for_diabetics.pdfIn PDF document text
    • http://jobasajavav.rf.gd/57033051412.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/jokes_for_adults_with_answers.pdfIn PDF document text
    • http://dumudolaba.epizy.com/tujisofavufomadujomagutiv.pdfIn PDF document text
    • http://fokozagizek.rf.gd/simple_website_css_templates_free.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_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 5852 bytes
SHA-256: 9afd38eb8b9c31cc0f3ed5bc85abadf00e6f825a3be0623f27cce843366b71f3
font_01_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 10552 bytes
SHA-256: e7dd03aa327f2bda8ced4248783d90babd2bef319f8daf133e555e9c79f079a2

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