Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c69b08854aa51f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 20:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f42e97d173dfbe84d412d7af11924a38 SHA-1: cf4858b1418e39111ee91ecfa3a906ed17456938 SHA-256: e0c69b08854aa51f4b7d0a255e80c688952824200408de3483cbaf97609d8771
184 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute traffic to various malicious or phishing sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's intended to lure users to external content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5553

Heuristics 5

  • 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
  • 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
  • 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://golowaki.ru/award?keyword=surah+al+an+am+urdu+translation+pdf
    • https://lazezareb.weebly.com/uploads/1/3/4/3/134311903/gerifunazo_kidoridar.pdf
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/8821330.pdf
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/35f8da12c2.pdf
    • http://vizilirudigub.getenjoyment.net/black_skins_white_masks_analysis.pdf
    • https://dinidoleto.weebly.com/uploads/1/3/0/9/130969871/88217.pdf
    • https://pofofeteb.weebly.com/uploads/1/3/2/6/132681268/7564052.pdf
    • http://zixaxagewan.mypressonline.com/82127810450.pdf
    • http://vofufime.mypressonline.com/vodijawozumesapifutod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_1d53b2e73fcf4d5a87881247b7b212e1.pdf?index=true
    • https://s3.amazonaws.com/mufukep/70757117316.pdf
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_e55023d216204d97b5840b56eaffb882.pdf?index=true
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_4ee6a19a15d84422aaa18cd574b3f977.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fe8ff17c-9957-49b2-bd1c-a5f126b0ce11/imagine_john_lennon_easy_piano_sheet_music_free.pdf
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_0c038e01abde4e8b9b5dcbcefb212393.pdf?index=true
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_8446d91a49c5402792a475829661290f.pdf?index=true
    • http://lododaz.rf.gd/melhores_poemas_cecilia_meireles.pdf
    • http://ravexigulot.rf.gd/how_to_fix_kirby_vacuum.pdf
    • https://s3.amazonaws.com/xazarujokemus/blue_cross_provider_manual_california.pdf
    • http://ditaxaj.rf.gd/biodegradable_packaging_materials_for_food.pdf
    • https://uploads.strikinglycdn.com/files/100b6664-9281-4ffd-bab6-cf854bbd623e/90084948375.pdf
    • http://vunonam.atwebpages.com/69732314605.pdf
    • http://zovibeviniga.myartsonline.com/2020_audi_a8_owners_manual.pdf
    • http://betiravel.epizy.com/google_spreadsheet_app_for_mac.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d5.bin
d4bcb72d05e82fde2648992aef605b6fa0708e9725db310b95511dae7531acf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 5384 bytes
font_01_sfnt_off000103f5.bin
568ce4232d43b93af76794a7168ce3ff82508325c410e52bf721eec8d74ef72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 11304 bytes

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