Malicious PDF — malware analysis report

Static analysis result for SHA-256 2314f2052a779933…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 05:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e27743d1ffc105504e00157118bf4612 SHA-1: bd5cfd8fb87b270e0364b587471f3f69b740c4a9 SHA-256: 2314f2052a779933e5d2bd334e518cce4b6b57ce6a8d12b79fa11f96c976dba5
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm designed to redirect users to potentially malicious websites. The presence of a ML classifier flagging it as malicious and ClamAV detecting it as Pdf.Phishing.Trojan further supports its malicious nature. The document body, though heavily obfuscated, appears to be related to search terms for game mods, suggesting a lure to attract users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=beast+quest+mod+apk+unlimited+money PDF link annotation
    • https://cdn.sqhk.co/jezaziritav/hghfgiS/war_commander_rogue_assault_apk_obb.pdfIn PDF document text
    • https://pekavodasusoku.weebly.com/uploads/1/3/5/9/135982803/09706.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/nadizezub-bewebalatusami-feraniwivix.pdfIn PDF document text
    • https://bowixasexagat.weebly.com/uploads/1/3/4/0/134041419/7557625.pdfIn PDF document text
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/bfae6.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/7f34e6.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/tazanenabenebiboz.pdfIn PDF document text
    • https://wuwikofoxanep.weebly.com/uploads/1/3/1/4/131437976/9e51e2f443cfb.pdfIn PDF document text
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/3678101.pdfIn PDF document text
    • https://labupapem.weebly.com/uploads/1/3/1/4/131406977/67d404f42.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/mewuk.pdfIn PDF document text
    • https://cdn.sqhk.co/roziguze/ifW99Zj/4k_cartoon_wallpaper_for_mobile.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/5024871.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_60e3eaa085c54d43a24b6a10f655dc79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2b18ef-2ecd-47b6-b867-bf29b7649d4e/jikilisureriki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e750c68-2dbf-4e9f-8ed7-0bf8b00972d4/93403913578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c0ed7b-d245-4c2f-bee3-307e9bd10bcf/93791253842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa0eed0-d02f-4e70-b03e-46cbbea2eb24/junie_b_jones_musical_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0263061e-d5ea-4529-92e5-6b15073ae745/87197928769.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_a152a813b5294e0bb80219fecc187a35.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 5348 bytes
SHA-256: f741ae7d1e6ef574eb901fa01e48efb4f09df6474bb5cdcc3cc7cf6419975348
font_01_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 15240 bytes
SHA-256: 5b587a25d11f160a1a827e150f57909a31afdf904d6749606ed9c19114ccf179