Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3e2d60c17d56cc…

MALICIOUS

PDF

89.0 KB Created: 2021-03-15 09:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d7074b7839e8bf3d39fa1212403069 SHA-1: b75aabc1ed48a220332f6c4debcc1501860a2fdf SHA-256: ee3e2d60c17d56ccf983dab486701309ce6899de3dfbab124564fec0cb2d420d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=percy+jackson+sea+of+monsters+film+cast
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/xuzigol.pdf
    • https://cdn-cms.f-static.net/uploads/4489244/normal_60392b246734a.pdf
    • http://pristav.pro/solid_liquid_gas_worksheet_for_ktg05a.pdf
    • http://iciko.xyz/ffx_guide_inside_sinrl9zv.pdf
    • https://majotowuwirup.weebly.com/uploads/1/3/5/3/135346036/kojux-sopajibufom.pdf
    • https://paxexituva.weebly.com/uploads/1/3/5/3/135332474/tiwupowiduwafol.pdf
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/bafumudin_logokomek.pdf
    • https://cdn-cms.f-static.net/uploads/4411219/normal_6038719ad3ded.pdf
    • http://tizakeguwowil.22web.org/tiger_rice_cooker.pdf
    • https://static.s123-cdn-static.com/uploads/4386349/normal_5fed797ab1d8a.pdf
    • http://pomirkapa.site/kuzoganigilesujou40y9.pdf
    • http://avtoshtorki.shop/2nd_grade_english_textbookzphdr.pdf
    • https://lalemudisezevo.weebly.com/uploads/1/3/4/3/134359520/jepoludamad_papufopulixowe_papojofutig_zuduwogok.pdf
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/pipebep.pdf
    • https://jigupeditu.weebly.com/uploads/1/3/1/3/131380623/jitizaniji.pdf
    • https://tavutafaj.weebly.com/uploads/1/3/1/4/131482866/joxadewiv.pdf
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/1275993.pdf
    • http://airbin.top/38323950966gwlnv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8b8125b0-ea99-4ed5-83d1-a6bc68d8d10b/25827531198.pdf
    • http://kimufigekufeta.rf.gd/6218974220.pdf
    • https://uploads.strikinglycdn.com/files/9049b289-9861-477f-bf3d-8617da3bcb7d/satoskar_pharmacology_book_free_download.pdf
    • http://kesobikifa.epizy.com/44561377544.pdf
    • https://uploads.strikinglycdn.com/files/077b96c0-7d9e-457a-8c7b-757878128740/finisanij.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c0b.bin
805e0942a3a640d0103df4305904bd826fbd4ecf602f6e44721ec6a54fd88547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 5272 bytes
font_01_sfnt_off00012df4.bin
a529374dafb0586109644fee51c9d4dd47c3f5f6de62a14efdf07ac44300dcb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF4 11688 bytes

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