Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bf699cf348185a…

MALICIOUS

PDF

87.8 KB Created: 2021-03-09 05:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 76113351f1e81c2439298de0c17d2f43 SHA-1: baa5e144b6e01b3c88624bd2331885c6ada7807e SHA-256: e2bf699cf348185a981fb7939f3bd8bf32bf75771f9c47a941a0748ac6d04bcf
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute or redirect to malicious content. The presence of a 'buried town mod apk' lure in one of the URLs indicates a potential phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=buried+town+mod+apk+sbenny PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480187/normal_5fd8ae77486d2.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/kimolega.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/how_to_cut_triangles_for_a_quilt.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/carbs_in_dunkin_donuts_bagel.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/what_is_development_biology_embryonic_and_fetal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5fdc80f8672d6.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/gurikedanulipenogunipa.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/61288825565.pdfIn PDF document text
    • http://paselon.getenjoyment.net/mastering_regular_expressions_in_javascript_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_6015bb20293b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_6044bb5d793c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nifusotajezunur.atwebpages.com/onn_dvd_player_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1b0734-0701-4dc2-82b5-9c8eaccba650/xisibowibupixomabuxiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79cf6e8f-bc25-499b-9d40-1d0ac093e147/zakitokevel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4643f51c-4bce-4b81-9c17-61a324d92c80/philips_respironics_remstar_plus_c-flex_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3478faaa-2874-44e2-91d1-f2b034583eb4/what_is_a_calling_card_cod_mobile.pdfIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_a5eb6aece82e42548a7a86f8a9dcb903.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_4567f960d6f44fab95c9e4077d1903cd.pdf?index=trueIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_9fbed198544d44ac8fcabee017debf6d.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_2b423cecfa594d48b26d6d10d23171b3.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_993a06cc2f354f9b9b0e9baa6f1bdb25.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95707c9c-86e8-4dcf-a894-7ca228ae7201/83634146302.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/rapibovowoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156c5a0a-107b-4b32-a5cd-ed2e98b1c0e1/best_free_diary_app_ios.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_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 2952 bytes
SHA-256: b89c4303625030d2e95510b1610b568a848623a3fbde79aeed2d377ea75054e4
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 5520 bytes
SHA-256: 65955325133e1d5ffe9bd0023340f4a87d9f2da70821e3578400678b6d58a5a9
font_02_sfnt_off00011275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11275 12044 bytes
SHA-256: 676212a81be1b4ea4d5401c816df6088c00dbb70cb935bf360733ad4943069de
font_03_sfnt_off00013b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B61 16132 bytes
SHA-256: 895f66822cee8096b629ba52ebdbe333aa959cf625638ac8af8884b25f69792f