Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5786ecac0c25dbf…

MALICIOUS

PDF

43.0 KB Created: 2020-10-03 17:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e2f8ff49593432ed470b1799f91f73f0 SHA-1: 2f23b091c772e8a24d57713b99347ec8d368237a SHA-256: b5786ecac0c25dbf87df469af86127c96212ee0f713cc0cd797ee2ece694661a
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://ttraff.me/pify?keyword=omb+circular+no.+a-11+%25282017%2529 In PDF document text
    • http://febugerax.theenglishegg.com/uploads/1/3/0/8/130813372/runilezelubafu-zuviwuwobe-vivomofa-ligixawod.pdfIn PDF document text
    • http://tosaw.crochetsweetcrochet.com/uploads/1/3/1/6/131636755/bekimepezofoba.pdfIn PDF document text
    • http://files.kellygrahl.com/uploads/1/3/0/7/130775282/babaxel.pdfIn PDF document text
    • http://files.workplacesafetyadvisors.com/uploads/1/3/0/7/130739949/zixuwebinuwewon.pdfIn PDF document text
    • http://files.popeglobalizationacademy.org/uploads/1/3/0/8/130874161/xokudar-gufuporebeka.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/30e2728c-8342-4866-ae19-fc162febe28d/71414914614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd349676-4f78-4684-97a2-66e5a50a0bcb/96552489587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb5d4a4-d09e-4440-9e79-1411bb1dd4c1/1327917689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec451a9-c874-400a-8de8-2d76d3c7cca2/tizekorutefaguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8f99e6-e0d1-4f6b-81a3-cbe28def319d/11664185635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea017f0-9fa9-4dab-9048-b8ca9a839e3f/nuvotoxifipot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3912c17-200b-479f-bdf4-77ff55a7e42b/xogotupowasejozosiseked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f4b4a4-46c4-4be2-9998-1d6c000d1dc1/21714069429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/88558020434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6700/2018/files/64150842528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/genie_excelerator_ii_manual.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_off00006513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6513 5560 bytes
SHA-256: c0a4bcb2345b06434905bff8886aec64f46228436fdaa5865f505c514718b709
font_01_sfnt_off00007807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7807 11784 bytes
SHA-256: 1b5c3b306df268af475d2009a6abfb10761d337b85454155d181584ccb871822

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