Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f75f6d35e4e9909…

MALICIOUS

PDF

72.0 KB Created: 2021-03-19 14:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0b8cbf4012bc4e2eecef38f64ab51d56 SHA-1: 59dbab86dacec8fb91cb5df4028c49a4e375f541 SHA-256: 9f75f6d35e4e99091463e9b4dd238ae1f6984d29174211459f253edf3b49d5b9
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating a phishing lure, specifically requesting recovery secrets or payment redirection. The embedded URLs and the document's structure suggest it is designed to trick users into visiting malicious sites for credential harvesting or financial fraud. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://maypoin.ru/wix?keyword=g+co+recover PDF link annotation
    • http://vzruvayarttraff.xyz/2844272371d2h06.pdfIn PDF document text
    • http://openchambre.xyz/yamaha_yas-203_subwoofer_pairingjwb9k.pdfIn PDF document text
    • http://zenafek.iblogger.org/45955605068.pdfIn PDF document text
    • http://rimka.xyz/77902812403kmyfa.pdfIn PDF document text
    • http://heliusdesign.ru/zodumug2s9w.pdfIn PDF document text
    • http://kieverts.xyz/what_is_chi_in_healthcarefiis2.pdfIn PDF document text
    • http://verifybadgesbusiness.com/imd_competitiveness_report_2017jgp1c.pdfIn PDF document text
    • http://bristol-yalta.run/blank_leaf_template9v3nv.pdfIn PDF document text
    • http://gibejujefuguxax.22web.org/jefizenivapow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_523365f3f6544d34ab09a453a4871815.pdf?index=trueIn PDF document text
    • http://pivimufe.atwebpages.com/nursing_diagnosis_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceed2113-879a-4d37-af09-6fb78fda3796/13401769001.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_39db9d24acfe486c8c4853bb153c7202.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac48354-47f1-416b-b5bc-8e6edff84a2f/zitufunomunekamugasupegi.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_265189ababac4c67af7cd6aeaa00efa9.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/napodizolavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3197f678-0343-49c0-848f-3807146a3ffd/sununurifis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846787ae-1413-42ea-b3e3-cf6ff9910b62/93741362276.pdfIn PDF document text
    • http://punugituk.epizy.com/the_dance_garth_brooks_sheet_music.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_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 4464 bytes
SHA-256: a69653c9666150a7cc78ed4f858892d0f289cfc424bf70cd1480da05aac3e555
font_01_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 10872 bytes
SHA-256: 962d9fb76a1ebc63108f336e562f20cb4576f64891e134eb5b0024606877843a

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