Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6232040f8df92b7…

MALICIOUS

PDF

72.4 KB Created: 2021-02-16 02:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ea41ecdd19e5bc4d3bd128c853422456 SHA-1: 94d113294b64dc52d7492446b994306dea487eca SHA-256: d6232040f8df92b78235f9bfc4dc36311aa38372be7252f9c9d98a4bba1aa85c
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm hosted on disposable domains, with a high ML score and ClamAV detection as a phishing trojan. The document body, though obfuscated, contains text related to resetting a Netgear router, suggesting a lure. The embedded URL points to a domain that likely hosts malicious content or phishing pages.

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://maypoin.ru/123?utm_term=how+to+reset+netgear+wnr2000+v4 PDF link annotation
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/wulibori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_600bff084aad1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5ffcc5817cdb3.pdfIn PDF document text
    • http://zedukibawubige.22web.org/poter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_6012658e9e84c.pdfIn PDF document text
    • http://fevonijanufoweg.iblogger.org/bionic_commando_full_pc_game.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/f26d42f585.pdfIn PDF document text
    • http://selizixid.iblogger.org/lejezamatidavuxofu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414491/normal_5ff9149952d02.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/Fjb9ijl/69460909479.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nanolato.rf.gd/bongo_songs_2018.pdfIn PDF document text
    • http://sedobuxekazadi.rf.gd/57393701367.pdfIn PDF document text
    • http://zezatavaveb.epizy.com/jibiwidisopati.pdfIn PDF document text
    • http://ripofosefalub.rf.gd/71635712927.pdfIn PDF document text
    • http://zejagal.rf.gd/29583974099.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD6 5036 bytes
SHA-256: 17e3b3d4f62f329448c3789601a6975e346c55a1dbc5c94808a86943ceb012d2
font_01_sfnt_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 11216 bytes
SHA-256: 9a862c1e9f27161d4fb3eecd043cc65a89dd262ff5f5bbccce720516cde5ee1b
font_02_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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