Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b06717367404cf2…

MALICIOUS

PDF

82.9 KB Created: 2021-02-25 12:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d5c39a40bb681ff593793b84b1c96158 SHA-1: 09623acb341b28fb38ac81b76b02e5576a2ffbb4 SHA-256: 4b06717367404cf24cd96b559359586e3113bfaf87f93f6609d2b909429ac225
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a large number of external links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external URLs, one of which impersonates the Disney brand, likely to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/ae10e3359760c.pdf.
  • 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://jacksth.ru/wix?keyword=surrealism+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/fapiwejagiz/whgiiaY/57658464114.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/ae10e3359760c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_602804a4682ad.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/ximiredelubosaduk.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/jdRjbBR/91434747828.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/jcZhcGw/filifofalisejilidulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_600c9f6823609.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/0KidYid/stalin_malhotra_physics_class_9_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/gehcjgc/teacher_appreciation_week_freebies_phoenix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_600c93eae6221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_600103e98e162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_5fdba72a79085.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/fidefofudi/birmingham_new_street_to_worcester_platform.pdfIn PDF document text
    • http://moxowofabijis.epizy.com/nikon_coolscan_v_ls-50_ed_film_scanner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/audi_rs7_performance_used.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/latest_hollywood_movies_in_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/88281525775.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/jawegevor.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/mango_street_presets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/hp_officejet_j4680_check_ink_levels.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/welcome_back_wallpaper_free.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_off00010790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10790 5184 bytes
SHA-256: af5a2fb3df3459860c40f4ff0e482d5d966e4243b6fa27ba3057270483bb5ce6
font_01_sfnt_off00011915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11915 10888 bytes
SHA-256: f229f4c003cf311ee0e51380d15ce0f3f0584e90828d8242a3d67cb18eaeecc6

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