Malicious PDF — malware analysis report

Static analysis result for SHA-256 4688c5647cdf758d…

MALICIOUS

PDF

39.9 KB Created: 2020-10-31 07:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7ef86476063a5c7024b36b2d0069a064 SHA-1: 1c86fbefe992222fe69992459a8cc00dbfc94825 SHA-256: 4688c5647cdf758dfa003804cfc75dd395a015b2a0b25e9309a46970259ac462
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=ecolab+apex+tsc+manual In PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/b283fb8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5f9c6a4959aa9.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/3240441.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/gakepovilax.pdfIn PDF document text
    • https://jajedasas.weebly.com/uploads/1/3/4/2/134234666/a32e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f9776577b0cf.pdfIn PDF document text
    • https://mikudone.weebly.com/uploads/1/3/4/3/134370159/9393720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5f98cbc728b78.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000050ae.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000050ae.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00008536.bin)
    • https://s3.amazonaws.com/wonoti/pitebukasuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6394eae-5235-4a0f-9dd5-6a3dde56ea37/90828758297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1696/9149/files/automatic_call_recorder_pro_apk_hidden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259520ec-7594-4600-81aa-c6b7536e121a/1713597245.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 extracted file (font_00_sfnt_off000050ae.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AE 4984 bytes
SHA-256: 641631c3b8139d6b245d20aa043c41b778e289f8552432279cc414b0ab022fc7
font_01_sfnt_off0000618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 10644 bytes
SHA-256: 8ba0492715371126252ea60d5a82bb961e10da6d5da31afec91143d3b3e37929
font_02_sfnt_off00008536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8536 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71