Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bedb472c28f4fe5…

MALICIOUS

PDF

63.3 KB Created: 2020-10-28 16:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: c431857048e156c7383ee7f5c1a2bf8d SHA-1: 1cc14507d203876c9928164278f5a2dcee91675d SHA-256: 9bedb472c28f4fe5602a50a5b49a6ebd0ae3b1d11932a36403bc6c084c9a3861
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=william+and+sly+2+kizi In PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/kizokegi.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/buwobu.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/d2b09d6.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/poralujoneno.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000088cd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000088cd.bin)
    • https://s3.amazonaws.com/davawina/wunutugamabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa7d7f4-331c-41b1-9af5-54130d8f61a6/xewojeferivozivovolinax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c95b08-4436-4f57-b3d7-2a964f321bf3/7536511305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2736/5527/files/baileys_irish_car_bomb_cupcakes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8814/3039/files/introduction_to_physiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0be7a3-7b8f-4360-a00a-276b9f74102e/bedepoxudosogudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f24c99-1cbf-466f-8bb0-97d6d40e3a2b/vajurufodajenaxedovogapix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0559ff1-f9a3-429b-b128-93d2ba0caeff/93354455069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6f87a8-5699-4d51-8097-ca0645b7d0ae/nike_self_lacing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f693ab4-46d2-4941-b2b9-d65254b75274/66128967244.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/meditation_practices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13fbb34a-ecd5-41ae-b946-1183edff0186/dazitazoxemawotidupux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6958b692-423c-405e-a214-d6dbef78605e/lobuwiwakivaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ce012a-d427-48a8-8af3-8fecac0c18b9/luzizudowasikagixuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5349/3655/files/tisurujonegagifafutinu.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://dejavu.sourceforge.netIn extracted file (stream_005_off0000c393.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_005_off0000c393.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off000088cd.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000c393.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC393 26148 bytes
SHA-256: c477af0c4c89e3cbf456f30a0ed32fcba5bd519a99595e7431dd703e32401347
font_00_sfnt_off000088cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CD 5236 bytes
SHA-256: 48f271321d0ec9f9513a3a0124b2861ff56169ec2935074d9668088facf765c2
font_01_sfnt_off00009aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAA 12764 bytes
SHA-256: 7fa8952f3c61fe18101a0a782dc411d54b0d84a210a3c46d36d86f96c5825cab