Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdc44d89ad35599…

MALICIOUS

PDF

82.6 KB Created: 2020-11-14 15:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a9d428462eb6328e80e8a06a6482b1e2 SHA-1: 97f41617cca325acbf9a649419481f3708388cb4 SHA-256: 6fdc44d89ad3559909e7e9a354a248d44cf8fbcc941836f2162cda130be0782c
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=sat+1+book+pdf PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/lojojulosagawakol.pdfIn PDF document text
    • https://takoxoja.weebly.com/uploads/1/3/4/3/134371043/jojobaruravujos-vunilofu.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/basusefepi.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/cc3e4b38-a4db-4687-ac6c-e53cd64cbfdd/jack_kornfield_books_a_path_with_hea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368f96b1-ad35-4f21-bf48-f90dbb85251d/10140514847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa65c8a-de83-4564-8a2a-3997139ceaff/26238129146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20ebf73-d2b9-4d05-b9d7-31846bc78d10/tiwewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4780182-3acb-475e-90fe-a06e59635756/apadana_of_darius_and_xerxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08607fb1-a594-43e6-862d-36bcb76a5d71/xubajosizefinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda20c4b-afaf-49ba-abdf-9dfb93541bf6/7492949751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fba556-75ff-49ff-ad47-5c64a4db71ac/motuvamobekodilaruneno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b766030-e2b0-4f3f-a69c-a50d579e4364/37829291303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f0a765-5844-4b00-88d8-7191f86c58a8/71442358718.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 5088 bytes
SHA-256: 9bfbf849be1275d861c9af8c3042f393619c83554b6e2f9bcd5b15046301a43e
font_01_sfnt_off00011a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2A 10496 bytes
SHA-256: c84984cc3042cc93090f119619524ed4ada5c0154fe803bcad81604c189ab078

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