Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e8656a1ad58a5f…

MALICIOUS

PDF

42.1 KB Created: 2020-11-02 12:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 755c564ea959920cfb7bb28ca213d35d SHA-1: 9932d69cbdcbb84641fd837bf006b9b0c93fa3ab SHA-256: a8e8656a1ad58a5f5131e1ab4013e1cf4f50098e841ad0a71341c4165e4c90f3
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/aws?keyword=what+is+a+wsd+port+on+a+computer In PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/8fd11da9ddc9.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/silopisujomap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f9df62dd7f71.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://cdn.shopify.com/s/files/1/0502/8210/2984/files/dyna_glo_kerosene_heater_rmc_95-c4_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f1cb63-6d53-4518-bb7c-9a04ac063c95/62409788820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0524/6112/files/46113916917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9432/0310/files/patti_nielson_911_call.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d785766-9f7c-402f-a14e-f66919fb07f8/litarebobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8157/1743/files/why_can_you_avoid_plagiarism.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/vopegidikafo.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_off00005941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 5268 bytes
SHA-256: 3efea89c1aaee430fcaaeff914ce8fd3d2f11bcbef2cb6cefe92dd1afece44c6
font_01_sfnt_off00006b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0A 10224 bytes
SHA-256: d4e332fa6f36ad61ef3539df7678e69af423bec790db880c1fbeae7853c04f68
font_02_sfnt_off00008e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378