Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f64f3add6af7c4e…

MALICIOUS

PDF

74.5 KB Created: 2020-11-13 04:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 969730fb08fc62655bf5e0776b79f15f SHA-1: 6a40a3f0c53025fe9852cb8c415658de9dcf5c98 SHA-256: 9f64f3add6af7c4eb6b4d2e5792638d9a70290fc3f8b73e8acbb93e5bfabcc17
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=keeping+up+with+the+kardashians+season+16+episode+8+watch+online In PDF document text
    • https://sigodujirole.weebly.com/uploads/1/3/4/3/134319969/4561818.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/9628272.pdfIn PDF document text
    • https://puxokobipo.weebly.com/uploads/1/3/4/5/134524361/5619418.pdfIn PDF document text
    • https://nepagezefo.weebly.com/uploads/1/3/4/4/134472827/dd95eec16da5108.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8d8baf-6848-4ce6-b9c7-76f37625f824/26007276808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94abbffa-c185-46a7-82cd-6d9928975594/starting_strength_book.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/marlborough_township_pa_zoning_map.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/54022071077.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/21812573125.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mitukaresevoneru.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/witexera.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/mission_statement_for_emirates_airline.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/indian_food_calorie_chart_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/th8320r1003_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70fa772-c914-4283-8ede-d0e603d3933d/trig_problem_solving_worksheet_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_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 5860 bytes
SHA-256: aac2b76f9dbbb65ad9182513f5637fab3598a1c391099a07ebf301a5c5e9bb62
font_01_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 10484 bytes
SHA-256: b45ab639e9742f6758eaee044f98194777bc406ef746d71a52ac5082f4255b79

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