Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7922d8867b5c9a…

MALICIOUS

PDF

99.8 KB Created: 2021-04-25 07:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b00fd7e04582b14fb0a1e67678c2ed5 SHA-1: 513bcfc9cf4a0b43409dfd1fcf9e00fa5fbcf322 SHA-256: 1c7922d8867b5c9ac7cdb8764652ee8403f9809f3f3a012da710d06d0927e354
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 0.9990

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://nipisod.ru/strik?utm_term=t-sql+functions+tutorial PDF link annotation
    • http://sevoxotedeki.medianewsonline.com/what_is_the_sequel_to_london_has_fallen.pdfIn PDF document text
    • http://maxidadikegi.iblogger.org/endosymbiosis_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/gergehe/simple_fall_card_ideas_for_birthday.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_6003b6cf529b4.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/gfJidQ0/6826421336.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/ijZgdHg/steven_universe_warp_tour_transcript.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/jhEibhh/sinalorobonizaburiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456667/normal_5fce85d51ba10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_600750e8e6b42.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/ludilaxexisigagodidam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fcdc336d05bf.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/fvjacMh/audio_cutter_and_joiner_software_for_windows.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/bufexa/81231140115.pdfIn PDF document text
    • http://xoviketi.epizy.com/14427651811.pdfIn PDF document text
    • http://pojuxesut.epizy.com/basic_computer_knowledge_mcq_free.pdfIn PDF document text
    • http://lesuzikabe.epizy.com/av_malformation_spinal_cord_radiology.pdfIn PDF document text
    • http://xubumanazi.rf.gd/aitsl_professional_standards_proficient.pdfIn PDF document text
    • http://livofos.epizy.com/tuxopuzusev.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/spinach_feta_pasta_sauce.pdfIn PDF document text
    • http://degeluvugo.rf.gd/business_english_marketing_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/psychiatric_mental_health_nursing_book_townsend.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/engineering_mathematics_3_vtu_notes_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/gigugakupusazifineru.pdfIn PDF document text
    • http://lugenofakikale.rf.gd/sojemadofanate.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/python_programming_book_for_beginners.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_off000147dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DC 4984 bytes
SHA-256: 11c603e3571d24e54d0daf5c80aabfad684e040dd5aeae2a8a1cd9223f79f413
font_01_sfnt_off000158e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E9 11824 bytes
SHA-256: 31e8771fd654af17f2642ef5db554547e584caffc9ea6bb2a9b004b7f854438e

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