Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63ba4aee611cd78…

MALICIOUS

PDF

76.0 KB Created: 2021-02-21 12:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3a00216448b931c68f9ce91b63b11c4e SHA-1: 6cdeaa24163f385e8bc265eeb78a4746d93d8b60 SHA-256: a63ba4aee611cd787ad43d0c1d2f5918c81106b12c66f488b8edae0109a07fe8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=is+uk+electronic+world+legit PDF link annotation
    • https://cdn.sqhk.co/pumopijaku/ogigjbc/to-_do_list_task_reminder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_602483abce322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fce6a77256f0.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/getokowudow_lupekazinala_jawusesefo.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/VihjbfZ/fisusemeribesetuv.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/current_college_student_resume_template.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/gMKQiiI/spades_plus_cheats_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirerom/fiagcFl/tojinujaretotamogol.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/0AIihby/hotels_near_chattanooga_tn_convention_center.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/fzhggcG/74865408371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_601db3743c791.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/NQ3hajj/airtel_smart_recharge_23_code.pdfIn PDF document text
    • https://cdn.sqhk.co/vazedibimi/8ibiezQ/teddy_roosevelt_terrier_puppies_for_sale.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/lezopobigeza/nvsp_status_check.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/xeweporebakawogur.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_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 4992 bytes
SHA-256: 4850af3b9adaee6f7ebc30d9e4e40903d31f7c2ec925bec9ef62ef6c4b56ed9b
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 10852 bytes
SHA-256: e15eee518b1604997d03b0dd73f346898bd2c7b6c587e28f18f6bcfde5c7426a