Malicious PDF — malware analysis report

Static analysis result for SHA-256 480aaf0016f4b62e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-20 08:56:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 27f4de660170881c01032a1367bceabd SHA-1: e5f34bed4aed54f9f6f23560c2f99e18fc3a62a9 SHA-256: 480aaf0016f4b62e2c894f590bc5a9ff50aa34f70c9d1635e971efdc09a70b90
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, hints at a lure related to 'pressure unit conversion excel sheet', which is likely a pretext to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=pressure+unit+conversion+excel+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469116/normal_6052e50451f64.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/6202133.pdfIn PDF document text
    • http://i12tws.website/begatudap2nj2j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_6037433bbc567.pdfIn PDF document text
    • https://vurosegeje.weebly.com/uploads/1/3/4/6/134651839/3654322.pdfIn PDF document text
    • http://4kuhd.me/fearless_taylor_swift_full_album4ruuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5fd332a750d11.pdfIn PDF document text
    • http://capridigi.com/13680248757hio5o.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/normas_568a_y_568bmt393.pdfIn PDF document text
    • https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/paxakenotitiso_nopobewip_bazipesove_wimilujapise.pdfIn PDF document text
    • https://walamezer.weebly.com/uploads/1/3/0/7/130740591/bca0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_6020cdb9d68b9.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/fuwimoratijoba-ranigasenovefo-basizize-wejasu.pdfIn PDF document text
    • http://joblanc.xyz/46276086299v64xa.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/4165aa3882.pdfIn PDF document text
    • http://pubgucbayim.com/lg_27mk60tm_refresh_rate277zo.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/4092927.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/49RAzcs/bingo_song_download.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/WOrfKGP/economist_definition_of_profit.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/60929081216sijc1.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/sjdNmGy/11211678668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 4804 bytes
SHA-256: 1449ee817d14758d666726ea4eb2607eab128ff2f9debb6849de1823c5478c41
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 10848 bytes
SHA-256: d73e9e32487c6c86be83864902a0b68fcd2b5f5f33e988f72d38588784b1556b

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