Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed088f977f7e567…

MALICIOUS

PDF

72.0 KB Created: 2021-02-12 09:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 59647dafa594ebffb876cef0641bf489 SHA-1: 6c632e30672080494f0218162a2896f8aaa3d137 SHA-256: aed088f977f7e5671ba56cf34c9b0ef1d0f753279800ab500595c8695c03c5b7
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a prominent one leading to 'jottigo.ru' disguised as a search result for a game manual. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=castlevania+nes+manual PDF link annotation
    • https://cdn.sqhk.co/bomoxale/jZ7BheK/58920959154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_60209df7cbc50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407747/normal_5fed193b0ded0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_6001892fbf20b.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/egejgps/simple_gluten_free_birthday_cake_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/vovidonob/ggSUlgd/bufenekebipiteso.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/igejedw/dual_monitor_tools_windows_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_6010007a182a8.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/sibejibew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453338/normal_60084f98bfda6.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/hesevji/samsung_smart_tv_guide_slow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470399/normal_5fc748aadc1f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_601baea515b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_5fd94affebef8.pdfIn PDF document text
    • https://romidemifavev.weebly.com/uploads/1/3/1/8/131857114/1985231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_601d799164904.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/jPhe9ii/adventure_capitalist_hack_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosifunugiwes.epizy.com/fallout_4_mod_list_guide.pdfIn PDF document text
    • http://sazosubegus.epizy.com/ccna_2_lab_answers.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_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 4700 bytes
SHA-256: 48683c2cd49a3f1dc72c77bf0b9f101b66782833f405882edb6bbb2f1ef094bd
font_01_sfnt_off0000ef7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 10408 bytes
SHA-256: 519d6587a51243acf28b892ad11e502736c550bc0b36c0b9f9ae5834c5ce117c

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