Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9fcfab3bf02612…

MALICIOUS

PDF

44.3 KB Created: 2020-11-06 12:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6e03268763f7b92535f6c0e27306830b SHA-1: 602c7c6933619e6d0776e890c493eb249a331786 SHA-256: 5d9fcfab3bf02612d367bd1ed9ea4ddc09d83713f5aa7fb12d725a983b4a9255
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffking.ru/strik?keyword=kingo+root+apk+for+android In PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/8016999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4a9af97d-333a-4e90-aa17-7cdb9c1b14a4/zivaxegaripupesifimik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7a1bc5-66ee-4c55-af63-ea8f59567623/50534625974.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/antihistaminicos_oftalmicos.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/feranubuteza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb57f565-6086-4572-ac8c-65832d78f15f/68557362854.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/7124271074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2e487f-865b-44ca-aae8-9b305528fc87/37376916202.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/48671958797.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/98444148406.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 4704 bytes
SHA-256: b62ed5e686be6cffa87141db0b5d67541ace029d0939691f07afa0e75a78d6c0
font_01_sfnt_off000071ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 11128 bytes
SHA-256: 55663505e85c2a7efe505e512dd9457e394450eac10f8228de3df5b9bb81003c
font_02_sfnt_off00009692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9692 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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