Malicious PDF — malware analysis report

Static analysis result for SHA-256 10daf5df57ad20c5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-21 05:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e655fa623a7d2b10161d44282285bb07 SHA-1: 1daeb417fc2e39ef1c90195c75243c0269697518 SHA-256: 10daf5df57ad20c5216ae1d239bfc06959a1ed09f53325af7e5cfe055fac891d
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://bologen.ru/wix?keyword=empire+total+war+star+wars+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467564/normal_60286995a5f57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5ff936e5d7c23.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/49618787b5c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5fdc9c562470c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_601717e082927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416513/normal_60087ca176498.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/patotale/retail_assortment_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/tower_defence_game_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/vefetiruwaxivuve.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/57830230673.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/84967934907.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/data_encapsulation_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/diboda.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/add_and_subtract_fractions_mixed_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/hr_director_interview_questions_and_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_off0000e681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE681 5156 bytes
SHA-256: c06419c62f8c540dedcdf571518832cd7cb029eee29c905ea7883e8816af66c6
font_01_sfnt_off0000f801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 10224 bytes
SHA-256: a9d2b123ccadadac4748bbffe0c675c7b808c39fddd0d0ae4b8ce3781c789e4b