Malicious PDF — malware analysis report

Static analysis result for SHA-256 89db36c65e45cf87…

MALICIOUS

PDF

38.5 KB Created: 2020-11-06 04:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 350dea7e89e16ff3933f20457d686ff0 SHA-1: c5ff1dbf1c3238d9b299ed91fbe1f470a0223a28 SHA-256: 89db36c65e45cf87d0cbce17c1fafcc3141d673adab3078bf5b706fb462c7e1d
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://traffking.ru/aws?keyword=panda+commerce+texas+menu In PDF document text
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/nemimoraz.pdfIn PDF document text
    • https://girejegi.weebly.com/uploads/1/3/4/4/134490844/294352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8a7210a5d30.pdfIn PDF document text
    • https://nimubawelekuf.weebly.com/uploads/1/3/4/2/134265751/8963faabf42d97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f8ef7be35ec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f92650c1462c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5f9c914f0a3f8.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/midasugexopaguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f9101b2aeabd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fa48634eec49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5f9a86352aa73.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/a6eaec94-3f35-45ee-9746-86c6bcf5142d/buvukirowarojebakuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8090d5-a2f2-4b59-9fe5-14aaa08decbf/zokixedufebudozedozitaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7c3ee7-65f7-4227-8661-f242ccc02b97/12000092096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a81d58-2dea-4ca4-97ca-a75f305ba3d0/wisanodesivowiriwakin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329b19b6-6032-4731-b4de-13965883647b/librerias_de_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db6ffe8-0c33-4043-8764-055c03c36d20/el_delantal_blanco_resumen.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_off00004a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A25 4956 bytes
SHA-256: 634a0f604a6143ee017d8558bd5c17adbe0d6e741a6b3e541a45250c1af810c3
font_01_sfnt_off00005ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 10196 bytes
SHA-256: 50138df52a1b08a0380843ebbcfc0d977b60f476d6633fec2075edf578d86907
font_02_sfnt_off00007dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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