Malicious PDF — malware analysis report

Static analysis result for SHA-256 7512e80a3451478d…

MALICIOUS

PDF

62.0 KB Created: 2020-11-14 04:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aadbd6fb1b3bbc5b14a4886d3e104f25 SHA-1: 16888a6592940d4685f88082556cf18357d7be44 SHA-256: 7512e80a3451478d11882f2b30203700c613502732ef7c41e4fa4e2a0010ba38
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/123?utm_term=ana+scope+and+standards+of+practice+book PDF link annotation
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/bumesuwepupik-korepemu-ludilunudavukiz-vuzagomasanakex.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/vujim_letewupifokuf_kimumegugazeva_rapiv.pdfIn PDF document text
    • https://xinifusat.weebly.com/uploads/1/3/4/3/134321574/gigegafajem.pdfIn PDF document text
    • https://jemokufofek.weebly.com/uploads/1/3/4/3/134312150/234189.pdfIn PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/tumuwawu-pekapuzatenaza.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/9699827.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/mukut/doxevokopemusimobuxal.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/vocabulary_test_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883ebaea-7d20-4633-9629-9735665a2d32/cups_without_straws.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gujipavowogavozodewafade.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/ada_county_arrest_records_boise.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/properties_of_proofs_in_geometry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a88cea-d724-4aa8-9450-b420275985c2/metodos_cualitativo_y_cuantitativo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a336ebf-a33b-4317-9e88-53c3ce4c99aa/25044595847.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/yamaha_jet_ski_manuals_online.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_off0000b689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB689 5308 bytes
SHA-256: 15d2d1a800c3da58ff8328493f36456b9f6d3e927d39d165a7d19e2e8a323354
font_01_sfnt_off0000c8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A8 10180 bytes
SHA-256: 03783830b55162a0f3daefa1122ab182039d95f4e96c94032c91cabcc9d42d8e

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