Malicious PDF — malware analysis report

Static analysis result for SHA-256 c071deb9bd81e55e…

MALICIOUS

PDF

84.4 KB Created: 2021-02-28 02:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8fc6825fa72b2d3bd001ad845373901d SHA-1: 9deaeaf4afa29d9cb5af0519ac59a5a4d0f3f017 SHA-256: c071deb9bd81e55e68b7fbfd9ef2ef3f46635e0b6db10d7a95d76a24c86a7884
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 0.9998

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://dugedepap.ru/strik?utm_term=alesis+dm10+mkii+pro+bundle+electronic+drum+set PDF link annotation
    • http://tasuvelimu.22web.org/83536044487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fd67fce7a40a.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/nuredumaxusenuj.pdfIn PDF document text
    • http://vetodegaro.22web.org/email_etiquette_worksheet.pdfIn PDF document text
    • http://good-production16.site/compensation_survey_reportc8bw2.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/under_the_dome_season_4_netflix.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/66365816766.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/why_does_my_kitchenaid_dishwasher_not_drain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453730/normal_5ff9eae275243.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
    • http://joluvolob.epizy.com/xabarotulesizenudalabazo.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/36167101886.pdfIn PDF document text
    • http://genufewewirim.rf.gd/h_letter_whatsapp_status_video_song.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/forgotten_realms_series_order.pdfIn PDF document text
    • http://babazemo.epizy.com/sap_crystal_reports_for_visual_studio_runtime.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/sirunula.pdfIn PDF document text
    • http://toxijojow.epizy.com/bilopoxalilozodise.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/telurisaxovowufezemokumu.pdfIn PDF document text
    • http://livigoguja.epizy.com/79353787535.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_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 5280 bytes
SHA-256: ce6971f9e7808135ec0cc7422eb6d9194ecd5762614844ee0d54409bde93b4eb
font_01_sfnt_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 11404 bytes
SHA-256: 5262828f1791c3d2587efe5f435b0095a95bdc4a79923d5782b1d1947d67e834
font_02_sfnt_off0001361e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f