Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fc84cb0d3e21c0…

MALICIOUS

PDF

105.4 KB Created: 2020-12-13 23:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 40eb08cffe585941dbad333fe214e6d5 SHA-1: 98cd9c703e83c9d996acd5e85ab993033a20a21d SHA-256: 86fc84cb0d3e21c093b9639251028fa80e871a4b9ae8837a91cf543c2d589e4a
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 0.9990

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://trafftec.ru/strik?utm_term=the+disney+look+guidelines PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://lapedegino.weebly.com/uploads/1/3/4/6/134689006/6824298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8e2caa0bef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f94d5e6f09bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_5fb9db24cc610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425919/normal_5fb46268db591.pdfIn PDF document text
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/3349343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_5fba4a02a17d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5fadcb4b15149.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/6ad93699-5492-4a29-8399-c2f37cc5a739/48370682791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92139724-bebf-4b15-88ac-357acae36388/21397714093.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/lebejiribon.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBF 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00014d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D94 1972 bytes
SHA-256: a1cfed9bbb29c5e8e1f673a98d9dc244e20b1ec1ab57de9c5085143b94754691
font_02_sfnt_off000156e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E8 4896 bytes
SHA-256: 0ed870a4be9ea7292252ed1697d5597e7351e2bd313595c194f958174d5e13b2
font_03_sfnt_off00016796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16796 2076 bytes
SHA-256: 33364e2eef7b6e2c97befa93ec1d37df4c427e6286e034250a5ff06d8b45867b
font_04_sfnt_off00017096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17096 11828 bytes
SHA-256: 8fd148c761085477bf833dda31934536c1fc58deb20ace2b0d917840832f69ae

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