Malicious PDF — malware analysis report

Static analysis result for SHA-256 061366ebbc73b33c…

MALICIOUS

PDF

49.6 KB Created: 2020-10-06 20:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8724c5c08b2010c4602e8e7115b96b6c SHA-1: 290129072db572a83e45270bce4c196ba5ea7431 SHA-256: 061366ebbc73b33c39b0d46484e10d895e20bfd5cfc18beba06266cf31d7db73
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://ggtraff.ru/strik?keyword=master+cleanse+recipe+32+oz In PDF document text
    • http://vedowatiw.qualityfoodvi.com/uploads/1/3/0/7/130775164/kujawegevor-noxebuzaresawi-tafiwigajinuwe-juwuk.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/tipovax.pdfIn PDF document text
    • https://site-1040327.mozfiles.com/files/1040327/34264755637.pdfIn PDF document text
    • https://site-1039539.mozfiles.com/files/1039539/93168619146.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/zebeweneguxudosep.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/190be535-ab57-4e47-9ec8-7dba297d8003/62515997393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6219a881-bcd0-4603-9612-666a194c4b5b/30022079264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a56925-bdbf-4fa8-99ac-185d9ad79b9a/kusufusetirurevipinuwaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d58607b-c1a9-44ae-ab44-55b231aff750/84482455931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8a9393-87c0-47a9-802f-ed4c4714a0d3/46820902848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2594efe5-caa0-428c-abb4-5708f6389cfe/63983935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6efb012-cee2-41b4-8e68-e327f3320aef/rinutukexaxubov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b24c28b-ff55-4478-8737-303ee78714f1/vamemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90d9451-eaa4-403e-b730-d3f304b069a1/62275259448.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_off00007a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 5276 bytes
SHA-256: 5f588853bd1a5c9752cce28fe2d4d8db194e097c575e768ec11c259800e8dfec
font_01_sfnt_off00008c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C30 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000094bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 10564 bytes
SHA-256: a57e94dd21234530fdc6739139ce1484985628d0dd8d12623bf643b34c31be5f

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