Malicious PDF — malware analysis report

Static analysis result for SHA-256 923b7daec60d45d5…

MALICIOUS

PDF

53.3 KB Created: 2020-10-20 15:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 00ee8e490066fa582b0c23c220fbe86f SHA-1: 6ae4dc9883bf41499045ee75625c0289545ae890 SHA-256: 923b7daec60d45d52e56e4af109e8d8bc6847024ef95e2ebbe114e555a9dae63
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=amethyst+house+epping+nh In PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/narodewavuzekom_xivatiketavas.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/maradu-kigakekitufazux-dutuvumomed.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/297575d1178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f872729d5cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8e51f604776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f89844fc13fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8d58a01491e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8cab0990943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8b7447544bb.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/fc443977-d5a6-4fcd-8643-faf5d9eef5d2/29821804831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f98a18d-5688-4fcc-bc1c-857d59bce49d/94977567967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f0ea9c-0cae-411a-abb1-f7602e99a2f7/zavedaluxipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc202fa6-b463-4a5b-8194-83fe71b1280f/78507541538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4947/2159/files/missguided_denim_jumpsuit_asos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3680/5800/files/punibawetimujakinabupafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9010/9097/files/jesomapuvilevodolipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3866/1534/files/is_physical_appearance_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d4f103-0a42-42f1-8b86-a5a9958e508c/wifukezesusivumedaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b53582e-1759-4b51-8624-36dc910154bc/53978974044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def406e3-acd9-487d-9dff-414638e51d52/tebepewus.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_off00008545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8545 4868 bytes
SHA-256: a42ce9bbbd4b2ba9732f7d9c0ef77ffde1f939eed34209a829cd259e247adef5
font_01_sfnt_off000095c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C4 10556 bytes
SHA-256: 711222341c65db966385ad4a718a5357416e264db8668b02b3d768284acc9b80
font_02_sfnt_off0000b9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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