Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ba7b57012a6326…

MALICIOUS

PDF

76.5 KB Created: 2021-02-27 20:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 32151178fe9c432b44581613a32979da SHA-1: fc3583d3ed0d702d50be84bb1d1bd4e7089e19a3 SHA-256: f9ba7b57012a63268368a96856231569f6a81c1e17e1c28b3a33ec9136a6d768
126 Risk Score

Malware Insights

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

The PDF file is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm on disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to 'wind energy in south africa'. The primary IOCs are URLs pointing to suspicious domains, likely used to host further malicious content or redirect users.

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://fokemale.ru/strik?utm_term=the+importance+of+wind+energy+in+south+africa PDF link annotation
    • http://vumonivaxozutod.mypressonline.com/19724955213.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/hijduJq/tip_tracker_android_app.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/nativaz.pdfIn PDF document text
    • http://gopagagoraxu.22web.org/a_dance_with_dragons.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/what_is_an_allusion_in_fahrenheit_451.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/Tjfhjhh/halloween_costumes_2019_women_s_plus_size.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/ahiegjn/zuvudofuwepage.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/nuxomigo/philips_ambilight_app.pdfIn PDF document text
    • http://gonafumereber.epizy.com/gavobewilijil.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/dekatife.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/freelance_storyboard_artist_contract.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/39223721217.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/samsung_xpress_c480fw_toner_yellow.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/kowipepogoni.pdfIn PDF document text
    • http://tiluremuxaz.epizy.com/35983146495.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_off0000e8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A2 5680 bytes
SHA-256: 3cab710d3fa295428dab6bc0af61bcd53aa2635a4a8ae38f076330920577a8de
font_01_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 11680 bytes
SHA-256: 84b498730988061999d5df1949f2c9705ef75598e397c758e97704ce5f2d4e57

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