Malicious PDF — malware analysis report

Static analysis result for SHA-256 782036ee3960e8f5…

MALICIOUS

PDF

80.5 KB Created: 2021-04-29 22:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5a255efd32bd8872a2299fec4c4c2254 SHA-1: 57663bf7ff6edb2afaabbba8b8a4b37feb57beee SHA-256: 782036ee3960e8f5cf2ad502fca9cd2ae303a6fdb9a04a1f273c72e3144abe44
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, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were directly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=all+greek+primordial+gods PDF link annotation
    • https://cdn.sqhk.co/wazilisiko/ieIigia/10335924807.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/Ticjijj/38586315196.pdfIn PDF document text
    • http://malurafokopumer.22web.org/substantivo_biforme_atividades.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/how_to_use_my_new_tracfone.pdfIn PDF document text
    • http://pokemonrivals.online/57559458897wxz8d.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/tejavi-duzodab-natopijux-bulex.pdfIn PDF document text
    • https://dotimozenut.weebly.com/uploads/1/3/5/4/135400211/lubedesidulatilavabi.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/hgcehdF/89751202031.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/JE7dhgS/plastic_snake_cube_puzzle_solution.pdfIn PDF document text
    • http://golixudib.mypressonline.com/97661600292.pdfIn PDF document text
    • http://educationonline.website/72817474916qchc6.pdfIn PDF document text
    • https://didefitelov.weebly.com/uploads/1/3/0/8/130874246/146655.pdfIn PDF document text
    • https://juwalonivegab.weebly.com/uploads/1/3/5/3/135309433/9de79e677.pdfIn PDF document text
    • http://stnold.com/bofifatodagojo0zktw.pdfIn PDF document text
    • http://nicepics.xyz/dokdo_shrimp_live_streambunix.pdfIn PDF document text
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/141c0.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/Kjagcgg/world_war_3_movie_2016.pdfIn PDF document text
    • http://copyrightviolationcenters.com/nc_drivers_license_questions_and_answers8kgzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_b0b4c4683a5b43e7ad6935c4a80b4792.pdf?index=trueIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/human_anatomy_drawing_tutorial.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_a27b6694e1b240d4b5837fd0531976f0.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_fa19e597e53f4fd78f0d98fc0aea486d.pdf?index=trueIn PDF document text
    • http://gikutixutawax.epizy.com/difobaxemumu.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_d33396b28330457e92feffeab35c9c0e.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_4743da2ab55e46398ef678d35d550d63.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_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 5332 bytes
SHA-256: 25bf818583f0422979ef122b186946eba95a0ae8c217f818bc1c744d19ec8452
font_01_sfnt_off00010eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAE 11168 bytes
SHA-256: b82859f70337019623036cd33ddc2d09eb63d285e120573e78bcfdc18f971845