Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8910d08108284bf…

MALICIOUS

PDF

70.7 KB Created: 2021-02-18 22:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 97ecb13aadeeaf99c8fdbffefc25f0c7 SHA-1: 3ef6f119db86b07b4edb67aebd1123192effab1c SHA-256: b8910d08108284bff4461cff753ab0681dfaec8a7cd09107740b2a7f080059b2
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/wix?keyword=rocket+mortgage+squarespace+login PDF link annotation
    • https://wojajibuji.weebly.com/uploads/1/3/0/8/130873996/vabanedatu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413850/normal_5fffa42b9c2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_601a888cc2b42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_601b19f617576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_601033a9cc6a7.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/wetufamenuxawiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456119/normal_5fe11ffbab52b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_5fe54da680490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fametofet.rf.gd/panis_angelicus_piano_sheet_music_free.pdfIn PDF document text
    • http://xejuzilawa.rf.gd/descriptive_research_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/wow_lockpicking_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/louver_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/liu_kang_mortal_kombat_11_combo_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/bitmap_image_to.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/20913787005.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/adanga_maru_full_movie_tamilrockers_isaimini.pdfIn PDF document text
    • http://dipimov.epizy.com/bigger_faster_stronger_workout_program.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/estimation_and_costing_book.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_off0000d691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD691 5452 bytes
SHA-256: 6dfb686fe6fb78f386fd2ec0ba240175bee6b17bd7506041935a2ff7c3100918
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 10764 bytes
SHA-256: 9eb5518b180acdab5039c23ff05043b7f046e32ce018fc341bf2efc6790c4954