Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e6b07d456e5211…

MALICIOUS

PDF

51.0 KB Created: 2020-11-03 20:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8587f9e6ab3ba785156cf6a494e62116 SHA-1: ddc836306d5ff67bc4f480addd14deba375fe623 SHA-256: 65e6b07d456e5211761cc94509137f0634db4de6fb5e7955491ae10e358fadee
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by 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 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 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://ggtraff.ru/strik?keyword=major+turning+points+in+ww2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5fa06ed1231f3.pdfIn PDF document text
    • https://zojajodasu.weebly.com/uploads/1/3/4/3/134354616/tapinidakeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5f998e25dd8ac.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://s3.amazonaws.com/xezonijida/scholastic_book_wizard_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/opposite_words_in_english_with_hindi_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7689cd-21bb-452f-a3e5-d9672c45dac0/wizuvugeva.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/giant_litter_box_commercial.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/monica_miss_thang_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93e32f3-2e17-4fa5-8bf5-2885e0e2e413/cameron_dr_house_kiss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc57b21-5b35-43de-a116-81e7d28c28f6/28407126323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868218dc-4df6-4d98-b920-c1a62c63f439/bujiji.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/35129158903.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/133883557.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_off00007c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 5024 bytes
SHA-256: 3100eb67c696dfd8300bf035c45298e6a4a25c4c6a912ed1d7e4f13e62ecbbd1
font_01_sfnt_off00008d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D62 10440 bytes
SHA-256: b04b324b11c95f5504eebecd0248a9bf6bd7d3022548c042953945954aab7d77
font_02_sfnt_off0000b0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F4 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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