Malicious PDF — malware analysis report

Static analysis result for SHA-256 c623c132fc250171…

MALICIOUS

PDF

51.5 KB Created: 2020-10-23 06:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0f7f18b21402487c0d5fe81c53ff36ba SHA-1: 1c3162ea1b6dcc500dcebe29c76bce3f1774b867 SHA-256: c623c132fc25017184117d186ab909decc65cfc954bf9e7a5b65aedf131b4b4f
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://gettraff.ru/aws?keyword=anatomie+pathologique+du+coeur+pdf In PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/63e2a690eb16.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/vufapipoxafatapu.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/9105116.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/dfd764e5-f7c4-4662-860a-28620f4b9fba/jointer_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb71c38e-b1cc-48bb-832a-64b830d1e3f1/50064890503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e44d89-c347-4f79-97af-2a2d4b0e8c65/72773809179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d53df4-121b-45ce-92ea-13d9d874658b/28511802579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc533676-2037-41b7-b136-2c592de4d4c1/5th_edition_players_handbook_fr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd53070-8e4a-4d5b-8e85-e12ec53e42ae/63096130015.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/horror_stories_in_telugu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/50290291792.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/economics_new_classical_versus_neoclassical_frameworks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af6402e-0d57-4572-af03-ce5801f474a2/32391348823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b70b27a0-0212-4720-a4e0-32af0b8322cb/twin_over_queen_bunk_bed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f3d1f9-7530-45d0-8c2f-0bc7f86285df/68951935653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b23da06-5d4d-4530-84eb-223a14cd5ccc/tusanuvibefokonezogameli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ef5c3e-939a-4a25-80d6-0b9cb826b1d8/dixuzunazezodifosanuvazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1634/6536/files/13934695027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7332/6242/files/bssc_cgl_notification_2020.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_off00007996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7996 5388 bytes
SHA-256: ecfa09c3ae6e137e2dad633fab8dfd9408d2f6b96df8bf0edfa8021e1dd211a4
font_01_sfnt_off00008bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB0 11912 bytes
SHA-256: 205548197b53202403810875b2abf6871b08ed97a81d0fdf772331b4e7e0fdd7
font_02_sfnt_off0000b0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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