Malicious PDF — malware analysis report

Static analysis result for SHA-256 660ac58f65bd576b…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 16:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 49d13581d43a2c7a14f77869372f556c SHA-1: 158a96471884bd297b3148c09ae4ebbfb0eb0f4c SHA-256: 660ac58f65bd576b0a377fc38b4633c31ec313ca03dd0eeff7d0a84f2531ebaf
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 0.9992

Heuristics 5

  • 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.
  • 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://ponafet.ru/strik?utm_term=plantronics+m70+instruction+manual PDF link annotation
    • http://magowowir.iblogger.org/lutavovozadegogugosuf.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/chain_breaker_piano_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5ff16dd1e06da.pdfIn PDF document text
    • http://kolomata.ru/snowbear_trailer_capacitysrhq7.pdfIn PDF document text
    • http://vevapefin.sportsontheweb.net/99888494280.pdfIn PDF document text
    • http://pixizosusonaxij.sportsontheweb.net/tulafoxopejujenita.pdfIn PDF document text
    • http://ttttrrrr.space/blocking_calls_on_androidnwyes.pdfIn PDF document text
    • http://lujakivuvig.22web.org/gukebabaxuzivekeval.pdfIn PDF document text
    • http://andyhongdigital.com/betway_apk_latest_versioncqjky.pdfIn PDF document text
    • http://train-home.ru/5167623658ouhk8.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/presonus_firepod_interface.pdfIn PDF document text
    • http://marafonsport.site/79426238748cujbc.pdfIn PDF document text
    • http://everydays.space/feedback_control_of_dynamic_systemsj32ei.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6015bcf566c34.pdfIn PDF document text
    • http://acupofjacob.com/the_monkees_im_a_believer_shrek8vkdx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_5ff23dedd784d.pdfIn PDF document text
    • http://rumafelaneli.mygamesonline.org/holistic_theory_of_development_steiner.pdfIn PDF document text
    • http://xtw2.club/how_to_calibrate_samsung_flex_washer0ciux.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/pasawexawinogad/jenkins_build_.net_core_2.2.pdfIn PDF document text
    • http://lesiterifok.epizy.com/ctet_answer_key_paper_1_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/robozofi.pdfIn PDF document text
    • http://sowezenuvafe.epizy.com/munchkin_speed_bottle_warmer_reviews.pdfIn PDF document text
    • http://xivuzadozazul.epizy.com/free_radicals_antioxidants_in_disease_and_health.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_off0000eb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 5168 bytes
SHA-256: 95a1ea4821f40248011b599d75185709824e011d5d13ab0e89e8689d756b7f06
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 11620 bytes
SHA-256: 7c7ab719b5ec713e0bc5af8e32fb1571f2c082e72982b450e8a0cc5676138c03

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