Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a559cd41fe3a16…

MALICIOUS

PDF

52.3 KB Created: 2020-11-06 09:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 633a32965a0ac40d339c933a0396d4aa SHA-1: d4b43cf089af34aff8786cf45725f0d2ab6916b8 SHA-256: 32a559cd41fe3a169aced67248f7eefd32f8357afd1b81641dd7248e7ba23b2a
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bedpage+alternative+websites In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5fa4b210671ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_5f9db16a0270a.pdfIn PDF document text
    • https://madudezogimune.weebly.com/uploads/1/3/4/3/134326665/zorap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f9356d0a5ba0.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/2acdedcb-a425-4879-a678-34050cad6630/3865596395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13654ef6-77ca-4905-8bf4-030144902245/16741382002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e58f14-388b-4cef-bb0c-423c81f9286c/girl_from_ipanema_ukulele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5197/2273/files/rutedejedunufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1586bd38-85bb-4414-b447-1565dc5b5178/misek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed730b27-628e-4d29-9d4a-e3fd2f7970e8/hanuman_chalisa_mp3_telugu_ms_rama_rao.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/zubogojejowegaruwop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/quran_pak_urdu_translation_kanzul_iman.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_off0000807b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 5144 bytes
SHA-256: 7cb56ff0303ef3cac400006e128e7e94e986ad5b6a06631bb8a4bd6cd9ecfda5
font_01_sfnt_off0000920a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 10432 bytes
SHA-256: 08e7fa27f528351d6f6d8ff15da1bbf5011a2d4757c3a5fd8c75806db5dbd935
font_02_sfnt_off0000b5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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