Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2be1b70641563af…

MALICIOUS

PDF

93.0 KB Created: 2021-03-20 04:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7b09825e4aaa014cca269864cfd19be SHA-1: 5979167e8787ea3dc02461d75108698a3ddbda5d SHA-256: f2be1b70641563afdb2e4a421216cb05eb779711f18231d220fbc100bcc1859f
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/award?keyword=arri+alexa+mini+user+manual+pdf PDF link annotation
    • http://rivimebowov.22web.org/16664225304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_603859bdd7b82.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/1014634.pdfIn PDF document text
    • http://cetop.xyz/dark_souls_2_cheat_engine_infinite_healthgodhb.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/which_smart_thermostats_do_not_require_a_c_wire.pdfIn PDF document text
    • http://kayikciakademi.com/luguxibatiti88g2y.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/how_to_ground_balance_a_garrett_ace_400.pdfIn PDF document text
    • https://nizakibete.weebly.com/uploads/1/3/4/3/134386075/49522b8660890c.pdfIn PDF document text
    • http://all-system7.work/nakodux1gqfm.pdfIn PDF document text
    • http://nickned.me/780382971645hj12.pdfIn PDF document text
    • http://wevebuvofuz.iblogger.org/7295406435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_601abc5b0618e.pdfIn PDF document text
    • http://sezituza.66ghz.com/fujexegusuvaxifam.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/jetewone.pdfIn PDF document text
    • https://rarozevalir.weebly.com/uploads/1/3/1/4/131437937/c6e7d5.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/9123791.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/7046033470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_601bc1e6ea891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzifoki.myartsonline.com/arquitectura_empresarial_togaf.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_c0bc6b9f93cf4a7e9052743af01c6eef.pdf?index=trueIn PDF document text
    • http://zuvuzevo.atwebpages.com/bordeaux_wine_region_map.pdfIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_be8ba160925f46b8a0723b4b7bf5793b.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_b45b118dc94440dab0f007c30988c080.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_bdab0d741f1f41bda78d7e9b59a9c235.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 5244 bytes
SHA-256: e720a59f699a682f29ccfff7d9d280631ef450cefd38217644e9cfc5b942be5f
font_01_sfnt_off00012619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 12548 bytes
SHA-256: 449fecfb705b2a8adaac3700a3be2c0d133b168a361f555a6cd16bca883e94df
font_02_sfnt_off0001503f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1503F 16288 bytes
SHA-256: 897cf2b70f4cbdbeb6abf451c016d5957d1a1de4ec62ea4e6a9870464d1d95c7