Malicious PDF — malware analysis report

Static analysis result for SHA-256 308e8a192f488913…

MALICIOUS

PDF

87.4 KB Created: 2021-03-25 01:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4ceeb0be308ae20ba70cb9d380843ce5 SHA-1: 1062504a057910f41023fb11a4846f3e72f5304d SHA-256: 308e8a192f48891397277808b25a9bb7ee7741749dd3f7196a49a735eaea868a
126 Risk Score

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 0.9994

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://jacksth.ru/wix?keyword=the+cosmic+perspective+7th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/dezuvosowato/rheWgeh/74465304737.pdfIn PDF document text
    • https://dilimeriju.weebly.com/uploads/1/3/5/3/135351787/pamovumid-dovewami-sibuziligi.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/kiss_the_rain_piano_sheet_roblox.pdfIn PDF document text
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/4535308.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/jl9Xjhj/pevuk.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/what_is_a_netgear_prosafe.pdfIn PDF document text
    • https://gigalenu.weebly.com/uploads/1/3/4/6/134652901/2668722.pdfIn PDF document text
    • http://bimizuzi.sportsontheweb.net/sciatica_exercises_arc.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/pTalhji/95674681603.pdfIn PDF document text
    • http://ru-payment.casa/gangster_full_movie_720pzrxzn.pdfIn PDF document text
    • http://sendgrid-de.com/612050602616pkrw.pdfIn PDF document text
    • http://vipmanmarket.space/normas_apa_para_ensayos_ejemplosseyuh.pdfIn PDF document text
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/6fdda820c43.pdfIn PDF document text
    • http://kompledom.com/if_every_living_thing_dies_alone8scaa.pdfIn PDF document text
    • http://firstflirts.site/perfume_book_review_patrick_suskindqw9ng.pdfIn PDF document text
    • https://mikuzowadakan.weebly.com/uploads/1/3/1/3/131383480/9596483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefabe/integumentary_system_skin_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/bose_acoustimass_15_cable_pinout.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vifazetanepibumedazozik.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/37212844804.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/puwimita.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/monesawugitoxodex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A39 5032 bytes
SHA-256: 70562f158e66387e361b0cc95c415c831d4baebcad0e65622a4cb6bf93ef8273
font_01_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 11568 bytes
SHA-256: 02991cc45164e058c05717b1a1373f3434854c6222ada37204662d39d8619d1a
font_02_sfnt_off00014237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14237 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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