Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea0d36d92b9dc59…

MALICIOUS

PDF

94.7 KB Created: 2021-03-01 20:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c800da067e74bb0e0ff8dac7ba49840f SHA-1: 26440091756441583654230acaf267af475f6a1c SHA-256: 0ea0d36d92b9dc59302a0e6270b6e824d740634aec5fa8ef1c5877047de4ad87
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to a suspicious domain. The presence of numerous links to disposable hosting and link farms suggests an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=what+are+the+different+shades+of+green PDF link annotation
    • http://gtomishebs.xyz/wojerazazu5oy8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_600df70b07235.pdfIn PDF document text
    • http://connexion-amelii.xyz/juzenemusoberukezeba8bu5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5ffae39932486.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/eJhgjR0/22754774751.pdfIn PDF document text
    • http://sportplays.ru/80715570131c4u1p.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/7802804.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/nodosogusememusodemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_600bf65ca6678.pdfIn PDF document text
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/4f269cabc2.pdfIn PDF document text
    • http://7lessons.fun/dozemaritesotixasars5nty.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/contax_t2_for_sale_new_york6n4q3.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/danby_50_pint_dehumidifier_with_pump_setup.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/9731079762.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/goneduzum/accent_color_android.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/nascla_contractors_guide_tennessee.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/pugalukepenilubi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C2 5148 bytes
SHA-256: 59e4c4db8c0a177428eb5ab5df2330164fa2d81f24653b4fccf9c72aba78eac7
font_01_sfnt_off00012b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B50 12552 bytes
SHA-256: 013ada43b2608f51bf65fed18546d7ab1b42598a033f5aeeaba4b77ee51db961
font_02_sfnt_off000155de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DE 16532 bytes
SHA-256: 17d0b558169f31d3e3c969e8bff43289d25d0c5d172fea89a97a2bd4175b41a3

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