Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f44761068b48a60…

MALICIOUS

PDF

75.9 KB Created: 2021-04-04 17:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fb9b7606b17332e1b824c1012e769b9b SHA-1: 25f780459cfac5d21150cd5ffe0aa5721b5d4616 SHA-256: 3f44761068b48a60ecfedd6d0c7e545da7b4a2cd22d1e4f8dcee6771c6f707a4
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 0.9998

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://soxebez.ru/strik?utm_term=fork+truck+licence+training PDF link annotation
    • http://mastera-saydinga.ru/95180338107jh8ge.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/door_closer_installation_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/lyjdi1l/wiful.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/gekupajitinaw.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/guvafanezuguroninobi.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/fhhiigp/android_auto_stopped_working_hyundai.pdfIn PDF document text
    • http://doordash.fun/tratamiento_para_alopecia_areata7c2rd.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/how_to_talk_to_anyone_at_work.pdfIn PDF document text
    • http://winclean-shop.space/wabumupafemonopiferexoqlunq.pdfIn PDF document text
    • http://everydays.space/digital_marketing_company_new_yorksd52c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xixitaxizowana.epizy.com/bandhan_songs_ming.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/part_design_in_catia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfe0681-271a-42ca-a79e-2b3c5c575ca3/nejidozovebenubibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7baaf82-c220-4ff4-ba43-e1ff83c640a2/jenakaxaxunamabijaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659cf5a7-650d-4d35-8718-f24d193a8a5c/bejalokopibasepatuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724ffc4f-8533-42cf-b480-58823d0564dc/watch_little_house_on_the_prairie_season_6_episode_21.pdfIn PDF document text
    • http://dinamol.epizy.com/the_sound_effects_bible_ric_viers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb19405-0485-43f9-ac67-693b1f7a1386/rogataxosivufawejekejesu.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_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 4808 bytes
SHA-256: 639a96215ab74101d9b9d4759d9faef665e0c20ceab1e05b3abf04aa7e319eb7
font_01_sfnt_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 11144 bytes
SHA-256: f1c6f48f68f5651c0a0ebfb655f709ea4b0e3e353b20c1b87a714518cfb98906

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