Malicious PDF — malware analysis report

Static analysis result for SHA-256 797005956799fdb1…

MALICIOUS

PDF

83.5 KB Created: 2021-02-15 09:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2ed97977f2a7812c8e6c7298d6f6c3c4 SHA-1: 9ad885fe767f1bd53e97e119189c370cd0c4b2f0 SHA-256: 797005956799fdb16ad8695e12cdb02ee3fe37f610574dc80efc17eab7b09581
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing further malware. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://druttle.ru/strik?utm_term=best+checkers+game+app PDF link annotation
    • https://guvoladedesu.weebly.com/uploads/1/3/1/4/131453897/waregilapan.pdfIn PDF document text
    • http://watertea.space/bd_song_ringtonen09kr.pdfIn PDF document text
    • http://dikuziropuviv.22web.org/jokoxawerozuwusefekame.pdfIn PDF document text
    • http://sojosabomoki.22web.org/ancestors_legacy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/gcNjeih/whispering_pines_rv_park_silver_springs_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/20iplhf/age_of_empires_2_campaign_order.pdfIn PDF document text
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/53c1e4ed19c086.pdfIn PDF document text
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/2e8fd903.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/zemokoxadizom-newenar-xelasopuzurax-levofaloxi.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/6c1f4bd9da.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/zesomel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nepunefetonub.epizy.com/computer_architecture_and_organization_by_hayes.pdfIn PDF document text
    • http://puredaw.rf.gd/asrock_g41m-_vs3_lan_driver_free.pdfIn PDF document text
    • http://sabaramofedofi.rf.gd/mission_mangal_full_movie_free_link.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 4952 bytes
SHA-256: 00f2ce409deb836667c55b7e980ffed49d2d6d6b5dc5415baf7e9798dbcf683d
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 10416 bytes
SHA-256: 563fd15fd34cd5ed0f83aa521da7cbb20b5f2bec74ced3639b7d79550e722aa2
font_02_sfnt_off00011dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBE 16088 bytes
SHA-256: 482b7b4fee51162e6a5d82ff10b0db2f6da6482a74a1be5a66137bb6d850bf40
font_03_sfnt_off00013276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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