Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4306c2365801f2c…

MALICIOUS

PDF

42.2 KB Created: 2020-10-12 02:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 72cf294022900ddce7869c3df3fd98ae SHA-1: 48dfb860c999657866173f720227b4efc4186f85 SHA-256: b4306c2365801f2cbebf22373d0eab725bf4508808d3e937b895111103c5ece6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=dumbbell+workout+plan+5+day In PDF document text
    • https://site-1038442.mozfiles.com/files/1038442/65585102635.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/87779680429.pdfIn PDF document text
    • https://site-1042501.mozfiles.com/files/1042501/lagofisakolisibupabobifox.pdfIn PDF document text
    • http://dijivef.visitthepreserve.com/uploads/1/3/1/3/131398591/92098.pdfIn PDF document text
    • http://files.atthyword.com/uploads/1/3/1/6/131636929/4046601.pdfIn PDF document text
    • http://files.ndpol.com/uploads/1/3/1/3/131380383/fa15ff780aab.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/ca098627-f38f-419a-8be1-43c81cabb254/85582574132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5895a6fe-9152-4e04-b51f-d55966e3cfd2/43704168467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d0be9f-570d-41b7-9f0b-b998d22916af/xudiwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b57073-3182-470f-8104-28e7c071f1b7/gasizatixafijutosaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd73cb4-0ca8-4a2a-b8fe-c5d4ae27635f/jojigizuvip.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_off00006705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 5448 bytes
SHA-256: 2b66046cb04cd234ca964799cd67525742e83f02d2023cade06b6d86492c22a8
font_01_sfnt_off0000798b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798B 10316 bytes
SHA-256: c8a855d8dcba34c1218614a0403b3e94e3ecd2359bf4ca21580b97d2cd1ffe3c