Malicious PDF — malware analysis report

Static analysis result for SHA-256 d100e14bae349a4f…

MALICIOUS

PDF

61.5 KB Created: 2020-11-27 09:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7e68ac740de457f2add674f2af3eacf SHA-1: d3f833814c6ae1c0dd1041d3972b118d0a29fe89 SHA-256: d100e14bae349a4fd9895e82b035926c7f77cb02939fdbfc30df93049fc1a629
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=fnaf+fanart+bonnie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f9c2969d5b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f9fa65e73271.pdfIn PDF document text
    • https://balomufe.weebly.com/uploads/1/3/4/5/134594694/nuwinedam_gaxojivuf_tipixogalaluviw_wejawaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454299/normal_5fb25a41e92e5.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/111306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/59af042c-1e7b-462b-bf3c-033cbbf27bcc/patidoxasarelif.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/the_shape_of_things_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caae6612-ddd4-4b55-92f7-be15edcd8e50/87027787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd1c9af-0740-4007-a923-148a68f69473/28396812583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28f7295-3177-44b0-9876-94691fa32129/350f_to_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746a3956-e40a-49d3-b768-0644a2c8ddd8/throne_of_glass_heir_of_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/8388613033.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_off0000a90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA90A 3044 bytes
SHA-256: eb4a9d3d797fd7a6871051971fbb81ef38b8a712fede7a944b520d7e2c6558d5
font_01_sfnt_off0000b3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EA 4648 bytes
SHA-256: 06a5d1bca56c76f794d34474a0a040ecb858c95bd7655a81a78c600ee75177c3
font_02_sfnt_off0000c3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CD 11420 bytes
SHA-256: e0174fb4ccf70f4b76b16f12a026a5b284a30348b8ffdf196fa3e7335198ef46

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