Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed22431ca64ae51…

MALICIOUS

PDF

79.3 KB Created: 2021-05-09 16:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 94de62cf8960175443106df9ed1b89dd SHA-1: 47aa572217decf04a11fa524604d66fe2c2af1da SHA-256: eed22431ca64ae51d8d724de3714479abcfa5ed89cdbae380ab29669c5410391
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 0.9998

Heuristics 4

  • 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://gimoguvi.ru/strik?utm_term=what+is+a+quantitative+study+in+nursing PDF link annotation
    • http://nelilovodik.scienceontheweb.net/guitar_chord_book.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/a_fire_upon_the_deep.pdfIn PDF document text
    • http://kofugefosuziwib.22web.org/basic_anatomy_terminology.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/applied_research_vs_basic_research.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/rizegikexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_ed9de6ec350044d2a4c96b3bd26342cb.pdf?index=trueIn PDF document text
    • http://vewawisu.onlinewebshop.net/gapeposigedovezilem.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/lipewesewakefugabupuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9c12b6-70ca-4f23-aa15-fcc41d0c70d7/economia_del_modo_de_produccion_feudal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613ac9e9-4a1a-4177-bc12-afd72f4248b3/how_long_does_2600mah_power_bank_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6093c6f7-0981-4b20-9e5c-e710bea68fb6/zasimidefebarod.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_412de9adbdc84805bbfc82b1fcf04925.pdf?index=trueIn PDF document text
    • https://6aca245b-72aa-4b14-b829-71607ecc1e06.filesusr.com/ugd/1decf9_1f982f43b09e488e9c24976fe4b2a1b3.pdf?index=trueIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/19091270917.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/36848763607.pdfIn PDF document text
    • http://ruzizoxotawuva.epizy.com/69646079404.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_d652a6ed5fda47b2934bd1dfde524e06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/can_dvr_connect_to_wifi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 5356 bytes
SHA-256: 9dc3b254c67b1706adf977bce0606fd7a60eb477c7d4a26b147c7e8dfadbac68
font_01_sfnt_off00010b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1F 10972 bytes
SHA-256: 3de97962cc06841c9041859162931c8338480c324049ac48c98d844fdaed15e7