Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ffcef2fc70b41b7…

MALICIOUS

PDF

83.3 KB Created: 2021-03-23 09:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 36dad2b1ee427581d5738eacf8111e9e SHA-1: b42fc1fe29d4da5d6374d8c4f153a631b1f77230 SHA-256: 1ffcef2fc70b41b777dda5937f0cde204c156a45c8e53c4013e5b73d366c9da5
194 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 functions as a link farm, directing users to download an application via the URL https://kuzutuzo.ru/wix?keyword=download+fly+gps+joystick+apk. The presence of numerous external links and a deceptive download button suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=download+fly+gps+joystick+apk PDF link annotation
    • https://cdn.sqhk.co/votezevon/gTvgegg/bike_race_free_motorcycle_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pikevasoze/hcjfhRV/89300440360.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/qhejiid/farm_story_forum.pdfIn PDF document text
    • http://xititarosoki.iblogger.org/88741474770.pdfIn PDF document text
    • http://otomail.business/network_security38r4k.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/oygdghg/23403541697.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/2856030.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/d7AjPJ3/healthy_eating_tips_for_seniors.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/5geihhc/las_vegas_tourism_news.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/haif5ha/249350647.pdfIn PDF document text
    • http://relax35.ru/ava_addams_new_porneha11.pdfIn PDF document text
    • http://openplafond.xyz/domodivebupexead5n6.pdfIn PDF document text
    • https://tajizaruf.weebly.com/uploads/1/3/0/8/130813694/fuxeberulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_717c5e2a30ab4ea1be24896e7e130acb.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_9995ae4f80a944219afd671adbb15e03.pdf?index=trueIn PDF document text
    • http://govatari.rf.gd/busofezoxolarik.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_d152cfd6649342b783b720b581122699.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_3ff81666899e45a0908094b18cf99812.pdf?index=trueIn PDF document text
    • http://xowevabi.epizy.com/zekefeketadumimakemu.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_547fe0dccdcf4012b12ea46acf2ca62d.pdf?index=trueIn 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_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5560 bytes
SHA-256: 84443da7b50d1e0d953364a2edf5a527bab4783e4fafb2c77f327671568792eb
font_01_sfnt_off0000f8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10134 11836 bytes
SHA-256: d45ccaf62c7820cdacdad012e0ea4ea24f5356cfbadb7a5f87b1ff38ec22ea41
font_03_sfnt_off000129bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BD 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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