Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2dbba619c774ff9…

MALICIOUS

PDF

80.2 KB Created: 2021-04-16 08:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2a29a3f39ee5647f286955e07e19e722 SHA-1: 639d1193871b3fda3d98b440dbfa1a6ab13c6a5c SHA-256: b2dbba619c774ff9584dd32422037930189aabcea1fd96926265f6826f509cd7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure related to job searching, directing users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by identifying the PDF as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://botokaw.ru/strik?utm_term=it+project+manager+jobs+near+me PDF link annotation
    • http://nunesop.scienceontheweb.net/53344036479.pdfIn PDF document text
    • https://cdn.sqhk.co/lululitoj/eNjnGk8/89272604233.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/bibjgx7/hago_lite_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5ff6adf36058d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497109/normal_5fe598b0b6284.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/7067274.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/albuterol_nebulizer_davis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_6042dbfa9c6fe.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/jibjhpM/today_date_uk_bank_holiday.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/vugekiriradoxit_golegox_baraw_lawalojiguze.pdfIn PDF document text
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/86567d3e4b6d.pdfIn PDF document text
    • http://lirubapifegira.22web.org/valupaw.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/how_much_does_a_nutritionist_make_a_year_in_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pujinit/equations_worksheet_chemistry.pdfIn PDF document text
    • http://dunoziboxisi.epizy.com/mini_cooper_car_cake_template.pdfIn PDF document text
    • http://jamowekovexure.epizy.com/27574039089.pdfIn PDF document text
    • http://wepexivir.epizy.com/77579429354.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/paxub.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_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 5372 bytes
SHA-256: 87bda8f0b9664b51b0880834d2e4dae579cef43478dfddec4e12ac82bd12766b
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 11256 bytes
SHA-256: b71374f457931d55d5aca1136c4d2592016e08a6768be65ef72b66fdedd36235

Open this report in the interactive analyzer, or submit your own file for analysis.