Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc109b9a231a2c2e…

MALICIOUS

PDF

34.6 KB Created: 2020-10-15 10:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28759c5e3fafe33370598afbabdf6216 SHA-1: 652761d3b9b730d191300065c677ddbae9e413fd SHA-256: cc109b9a231a2c2e10d78d8f9f4202dc24b3e23475caa15c715b8b823370cd3c
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/123?keyword=bateria+instrumento+musical+apk In PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/dcfa4214ba8d2d9.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/penodiw-tiregolugu-vafas.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/natemufive.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.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/9cbc2d15-7ecf-4829-a22c-1a6ae5b39a8b/tejobexusun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac75087-5d75-4d3d-b5c8-2ba4d583b6d9/45893303500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32cce0ea-aeb9-4e48-be87-7556dd94762d/82687756532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4516ffcb-9e14-46b3-afcd-c08259c83f22/91682503041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9893/0341/files/borderlands_2_bouclier_impaler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6668/2263/files/kobalt_10in_table_saw_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1729/2954/files/injustice_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f1bc61-c647-4d10-a2a7-5590ae0ceb67/suwilikesimaxerosexizure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440168b1-4427-4444-a845-b82afc00e14d/jesivubavurivad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b0feaf-5292-4cc1-9603-bd7f8d16f423/20498063865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94995d1-f1c5-42d6-89f6-71b3eef09064/67847259281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef765dd9-06bd-45f6-8524-e0d9d8eb17f2/sabodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95800141-6d5b-47e1-acd9-75114cb3389d/26476740988.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_off00004aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEA 5192 bytes
SHA-256: 7e91c591d7a6f0edcb81f83e93e96135ffdfd46a4ec1473ecfbfb2a4899ce08f
font_01_sfnt_off00005c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7B 9636 bytes
SHA-256: 5c9dc3da6a5a07f61909f4bbd06a3ca170f2840e51f3e0a8322d233ce956c9fa

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