Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c06937c93a6a48c…

MALICIOUS

PDF

37.5 KB Created: 2020-10-21 00:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 365d2dc4988dc0519e26f83d7399c045 SHA-1: 329155206eb593c3e28922d7ad2d2397efbe5c4a SHA-256: 6c06937c93a6a48c26ded7969353b581976d5108040de72e784ee34b9f7556d8
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/123?keyword=smule+vip+gratis+apk+5.9.9 In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/cfad1d.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/1f3c599.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8427/6415/files/18968984448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0499/1387/files/john_paul_jackson_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3185/4247/files/cafe_4_menu_mit.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/mapixevubupipofeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a355add-a397-477e-87d6-90a541aabdde/kofamajonanajugaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dfadd8-53c6-44f0-b66e-b61c6600d928/13590507600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e8beae-d91e-415f-9e89-09a0c7449e13/xejisuwunevalalit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cab4e7-e4fa-4086-a225-a0e0a5962409/29063812245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c9f305-37af-496e-bd82-f9a292e920f8/98274277731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc93710c-97b7-41e2-b350-29fb6ea4f7d2/94735396246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c7c436-20bd-4c1c-afb0-4ec6c427b4a5/vetugotepanejepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7a83cb-acfc-4c4f-8fc9-615803203153/vaxemesodamewupakin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5432659a-8995-417e-8f62-37b0036866a0/officejet_pro_6960_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f27ce5-5fed-42cf-b290-f197bac0d3ab/convert_musescore_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e39248-9ad5-4017-8c41-a1122517c6ad/85130443385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3027870-4003-4f0d-89ac-5351f8a10c40/sefavilibufirof.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_off000055c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C2 5680 bytes
SHA-256: 4c4f62ce2e287bc174d8fb804df1e64410b87f557ebdc8b38a34d9197c8cc3b2
font_01_sfnt_off00006904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6904 9764 bytes
SHA-256: fe4d2150459a78b8ab770c2394f75a935cc1d55f4c8772376803c037ff4b967c

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