Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d9be9ee696fde1…

MALICIOUS

PDF

75.0 KB Created: 2021-03-17 03:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26370fecb397c1bd5d538a581d2bcf2b SHA-1: 64c782bfb91c18af0c33973b7b8c64c15b59b974 SHA-256: 85d9be9ee696fde1279186b08b3ee3b5fb55242f6f020806ebe10e91c3b6dc6d
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The primary URL, 'https://fokemale.ru/award?keyword=concept+of+social+media+advertising+pdf', suggests a lure related to social media advertising. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8823

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/award?keyword=concept+of+social+media+advertising+pdf
    • https://cdn-cms.f-static.net/uploads/4393751/normal_6018ef29d248b.pdf
    • https://cdn-cms.f-static.net/uploads/4382004/normal_602badfe07ebf.pdf
    • https://sisebixa.weebly.com/uploads/1/3/4/6/134625325/290406.pdf
    • http://trydouche.xyz/95923386979th6o6.pdf
    • http://raisinshq.club/94449023836asgj6.pdf
    • https://jojonawizofobu.weebly.com/uploads/1/3/1/4/131438175/49493.pdf
    • http://boost-shop.xyz/harman_p68_pellet_stove_igniterkt6sm.pdf
    • https://jinobodusere.weebly.com/uploads/1/3/4/7/134722577/4896823.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dowirimidezifa.rf.gd/guides_for_brides.pdf
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_7bfdab0d2c6b4adc977cc70e24dea8a4.pdf?index=true
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_3b3ebb1651b946c0a65becf7395ee7e4.pdf?index=true
    • http://tozibuxadotoba.epizy.com/jotowejoziwuxaga.pdf
    • https://uploads.strikinglycdn.com/files/481deace-a975-44a3-81f7-1345eaff5532/what_does_5d_mean_on_a_whirlpool_cabrio_washer.pdf
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_497cbfe76d114c8cbd7967df0c8a5910.pdf?index=true
    • http://nimobavaze.epizy.com/android_9._0_compatible_phones.pdf
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_c29fb7c1ae984465a2a16f829650dcc4.pdf?index=true
    • https://ab0007c4-58ca-4db2-ab23-686bae4d53c1.filesusr.com/ugd/8bf248_3f6fda2d77bf49b7865eecc9e4b69425.pdf?index=true
    • http://vatujub.rf.gd/41120540428.pdf
    • http://dulidezupo.rf.gd/67741000253.pdf
    • https://uploads.strikinglycdn.com/files/e9794ea8-61a7-44ae-be3c-569b0f778d7b/86354735441.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e04.bin
d5d71a2aac40b2456e521c86cae65b5d7bcfa6c31d56b826aa2c8b8fa3c580a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 5440 bytes