Malicious PDF — malware analysis report

Static analysis result for SHA-256 29520342daad7aa0…

MALICIOUS

PDF

73.0 KB Created: 2020-12-03 16:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: de457129a84638bc61dc1986ec18af75 SHA-1: d32a2487f3d9924d4fd4aaded273cec756e6dafb SHA-256: 29520342daad7aa03895c7e1707de0fdf4f9153359a75d54308fc88cab0b3551
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://cctraff.ru/strik?utm_term=chicago+style+annotated+bibliography+purdue+owl In PDF document text
    • https://dolofironikuz.weebly.com/uploads/1/3/4/5/134588294/vabodim_vipodi_kezevosalinowoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403421/normal_5fc4cbd908cb3.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf5999b1ed035389ff233/1606284701451/dixapisisuzebemores.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/plan_plus_beograd_palilula.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc47cc5bc819f1cf46886f7/1606712523619/75478390845.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eacbc14dfd36fef1915a/t/5fc3f48f9d79364840083914/1606677649910/a_bag_belt_only_osrs.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/android_toolbar_home_button_icon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc118009ee0f32b8779a56e/1606490116620/tiwakofiwus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fc11a7f3f75b16643fb5b91/1606490752607/77331365628.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd116d1d5d775a7851cd4e/1606226289104/huesos_del_pie_derecho.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc2df284f983757203e8e1f/1606606634567/45301624826.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c25f11f6a41984a6f54c/t/5fc8127bd17d55300f9ecfb5/1606947451728/guess_the_50_movies_with_emojis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fbb61c8c741314323605/t/5fc1e2934e98326c02550e61/1606541973299/universal_gates_meaning.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_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 5572 bytes
SHA-256: d41a79fd8f4437b89b482dbae863b82bd0bcb0f53d7ded11902c21ada11018e8
font_01_sfnt_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 9996 bytes
SHA-256: 0dc7f90d94222a7ed00bd3813ade0b030ed1cfc1d2da2078da50e858bee73d4e
font_02_sfnt_off00010908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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