Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc029eac27ad1c5…

MALICIOUS

PDF

82.9 KB Created: 2021-04-16 07:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 284afef69c744eb8b92ba3ed2ae0524b SHA-1: 93c5bf62a9f66b6ac604d36e1a86fa4ef1ad5c13 SHA-256: 8fc029eac27ad1c588611dfe546add279ceca78c7c95d0a8325bdeb0aef9d182
134 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 an urgency-based 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 0.9994

Heuristics 6

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/strik?utm_term=all+maximum+ride+books+in+order PDF link annotation
    • http://jozozuruju.22web.org/lujid.pdfIn PDF document text
    • http://moitender.org/how_do_you_test_a_tvs_diodesamoy.pdfIn PDF document text
    • http://migriruy.ru/hp_officejet_5745_specs8yyv7.pdfIn PDF document text
    • http://idealica-official.website/49341986595gkpxm.pdfIn PDF document text
    • http://contact-git.top/lucas_alternator_wiring_diagramn6fxm.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/zosunegemozu.pdfIn PDF document text
    • http://pijojavoto.mygamesonline.org/adverbios_de_frecuencia_en_espaol_ejercicios.pdfIn PDF document text
    • http://pisesaganoduxad.iblogger.org/js_tutorial_point.pdfIn PDF document text
    • http://loveworld.club/how_to_read_trane_furnace_serial_numbers4fsa5.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/51594500783.pdfIn PDF document text
    • http://smartcoin.design/boi_dd_formos49o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_c6de4dd452e94b40bf591794452303dd.pdf?index=trueIn PDF document text
    • http://wofijanovifowi.epizy.com/croup_management_nice_guidelines.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_80c37824dc464d448a83fdfc8948c8f8.pdf?index=trueIn PDF document text
    • http://mowedesidafog.epizy.com/how_can_you_identify_a_metaphor.pdfIn PDF document text
    • http://tupesom.atwebpages.com/ribulijegikugisiwakubowod.pdfIn PDF document text
    • http://zadesejofugo.epizy.com/centrifugal_compressor_design_and_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192d5523-db12-4964-bad9-3fa556188762/22367471841.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_e120cb6421b54ea99890d261b22f88c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c9cbf4-94f2-42f4-9a26-1592867aded1/29438059232.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_ec94e3e6502b4574ab71d6400abeb8ee.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/japeviwesawajexitamo.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_94de41c8789545c4ac7e2d1e72fc85cc.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_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 5232 bytes
SHA-256: 6af62269e1adf7751d42189026a94488b2a172431c83be2df3498e0629228994
font_01_sfnt_off00011848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 10824 bytes
SHA-256: cce64c3630a6a03608fc8514ae921cc2efa90ea2efa3ddf10d613e9e950542ab