Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de0c5196c4ff001…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 16:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d35c1fedc000f47988fc0854360b954f SHA-1: c7db4997ab684c9345e6843d2b4c79363c05cf0e SHA-256: 8de0c5196c4ff001915195ce46f7c7c438cfc19f42bfd041944b5250d7ff2915
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified as a link farm, with one prominent URL being https://druttle.ru/strik?utm_term=can%2527t+help+falling+in+love+with+you+guitar+chords+easy. This heuristic, combined with ML classification and ClamAV detection, strongly suggests a phishing or malicious redirection attempt. No scripts were extracted, but the structure indicates a malicious intent to direct users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://druttle.ru/strik?utm_term=can%2527t+help+falling+in+love+with+you+guitar+chords+easy PDF link annotation
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/texewufebitatiz-wofuriputekus-dudutom.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/6oRidBl/guwuxafanadumelaridov.pdfIn PDF document text
    • https://kiburosipaso.weebly.com/uploads/1/3/4/6/134601321/piseli.pdfIn PDF document text
    • https://cdn.sqhk.co/zepinima/X9YQvii/mozuladofotoxuno.pdfIn PDF document text
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/9812009.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/ji3vjhF/4336097373.pdfIn PDF document text
    • https://mesifadenox.weebly.com/uploads/1/3/4/1/134108947/zigipupironakoz.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/eghhFib/argentina_war_criminals.pdfIn PDF document text
    • https://mavakonagidesa.weebly.com/uploads/1/3/1/4/131483278/kazajiwodetatovajeka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_4e5ddde986744b59a30580d4d1650394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/html_to_pythonkit.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/gnar_pro_guides.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/kedovafaranisoliz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa971fe-8d2b-45ea-907d-6c91d446fb2b/cuantos_son_2_m_en_milimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/fitamunalibizinosaketu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6a7b72-5c97-4db8-849c-38b30da5120b/64237963417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c65c5bc-c74b-4215-bd4c-a528477f287b/hi_point_c9_leather_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbdc60d-4afc-4adb-be79-bb26b6823b29/warriors_dont_cry_grandma_india_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/minn_kota_riptide_st_80_owners_manual.pdfIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_a7d2a877d6264e508dcdad9707e3e17d.pdf?index=trueIn PDF document text
    • http://sedexajukewuxep.epizy.com/xitorivesumosoxonipa.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/81442506042.pdfIn PDF document text
    • http://lowakeze.rf.gd/19528487993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec52deab-b06c-433c-a06d-e6b122dcc151/2301512975.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_4ee96e83bfba4cd7a661fa726322bc26.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_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 5608 bytes
SHA-256: c528a9b179206d5d5771925b1231dd167d8cb04d4b1792da9a812ae59f24eb22
font_01_sfnt_off000105a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A2 11092 bytes
SHA-256: 32578ed4523714a908af7786f7301d83aefff232e91d22c7e69a6afb20adc94d