Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15245003a970eb8…

MALICIOUS

PDF

107.2 KB Created: 2021-05-15 00:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8971448d12a4000b7672fd08be3f6461 SHA-1: b5d66b6be894d21435655d54dc0ad46c7c6f15af SHA-256: f15245003a970eb81536751f7d84345e1cdde1d85324b1af186d003f93d4177b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The primary lure appears to be a 'Tissot 1853 owners manual' to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=tissot+1853+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391015/normal_601ac58f06878.pdfIn PDF document text
    • http://vizit.store/36198660055y81l0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_6051eed4c3bce.pdfIn PDF document text
    • http://7lessons.space/24189297490tajns.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/zuvekawova-foxefafib-wikapowe-luvemagu.pdfIn PDF document text
    • https://wopipobije.weebly.com/uploads/1/3/4/8/134889886/lovuxoxukurizedowuf.pdfIn PDF document text
    • https://rebuxikaxaj.weebly.com/uploads/1/3/4/6/134668288/wazimo-wedekajuvad.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/Uqgge4u/unfccc_biennial_report_guidelines.pdfIn PDF document text
    • https://nobenore.weebly.com/uploads/1/3/2/6/132696051/4607069.pdfIn PDF document text
    • https://dajadigab.weebly.com/uploads/1/3/2/7/132712332/1810676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5feb565fee185.pdfIn PDF document text
    • http://lnstagramcentre.net/mikevere8xbdm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492245/normal_5feba0b552471.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/ZARiecE/download_mask_gun_multiplayer_fps_free_shooting_game.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/mefanegojidi.pdfIn PDF document text
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/2b37a39f7899d.pdfIn PDF document text
    • https://xizulorojude.weebly.com/uploads/1/3/5/3/135391297/fae6727bc465ffd.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
    • https://uploads.strikinglycdn.com/files/2f22da76-4f14-46a8-806d-0d7fc347a6eb/tojugulivod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d8b868-0d2c-467c-bdf8-e7aec28a9db1/sufuwemafefefaduwifipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30363bd-3615-46fe-8f6c-f048cecb7383/creative_sound_blaster_x-fi_titanium_hd_manual.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_off000140c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C9 5288 bytes
SHA-256: 76ff4d990926075ddf8c52c2cc6ffbbc78995140d47bc55f248b58e4feae4d99
font_01_sfnt_off000152b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B8 11680 bytes
SHA-256: 45a3557fdfacee8763b446d478e688eb52787e9ed4d181e3c40fb9d359b07fc4
font_02_sfnt_off00017a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6A 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00018f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F97 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378