Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc8bf180bda5de8…

MALICIOUS

PDF

116.7 KB Created: 2021-02-15 15:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7b0586f68413ad325ede4269d44383c6 SHA-1: ddcae8a4aaf0cc720ef93fa8e97b039fbead3ec1 SHA-256: 0fc8bf180bda5de83f96e5520ac390b798d79b41a087061b7124cef369f59249
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host a large number of links, likely for phishing or distributing further malware. No scripts were extracted, but the presence of many external URIs indicates a strong intent to redirect the user to malicious content.

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://seumenha.ru/123?utm_term=sample+restaurant+reviews+students PDF link annotation
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/9b2b9d9622.pdfIn PDF document text
    • http://kiwirixup.22web.org/74372166525.pdfIn PDF document text
    • http://domen3.club/banebiraxujagojayzjfk.pdfIn PDF document text
    • http://purigoguwoz.22web.org/microsoft_windows_7_antivirus_2012_free.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/kafeguwukimu.pdfIn PDF document text
    • https://kutinimi.weebly.com/uploads/1/3/4/6/134608846/df2b349.pdfIn PDF document text
    • http://kapubasezo.iblogger.org/51133800248.pdfIn PDF document text
    • https://durafozo.weebly.com/uploads/1/3/0/7/130740533/maxurazul-xixeriko-wiposaturemi.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/sibenatu.pdfIn PDF document text
    • http://idealicait.website/72398027116c20l7.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/nozamidujikabigowupuuxds9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaramapowo.rf.gd/android_studio_ndk_install_location.pdfIn PDF document text
    • http://somaxowirotiko.rf.gd/bizorigufoluzebi.pdfIn PDF document text
    • http://pufawalaxovosi.epizy.com/advanced_christmas_piano_duets_free_sheet_music.pdfIn PDF document text
    • http://dereduvate.epizy.com/candy_camera_latest_apk_file.pdfIn PDF document text
    • http://zalezir.epizy.com/76510701719.pdfIn PDF document text
    • http://vamovatalugoja.epizy.com/toyota_camry_2012_service_manual.pdfIn PDF document text
    • http://gusutawidike.epizy.com/84830976960.pdfIn PDF document text
    • http://nufewusuk.rf.gd/arya_2_full_movie_naa_songs.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B81 5360 bytes
SHA-256: 8e452c40908eff03f88d1bd350f3d488363da086c4a60711362a047ffd62d1b6
font_01_sfnt_off00019db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DB2 12632 bytes
SHA-256: 20ba9909cfe60886afa25d9a219618b154b9690e49913a667b851e954c81bc80

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