Malicious PDF — malware analysis report

Static analysis result for SHA-256 2294d414c367fe26…

MALICIOUS

PDF

100.2 KB Created: 2020-11-23 15:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5616c09b607c528e16eac6abd51fdea7 SHA-1: ef839809f2e7080d3e183be1296bcbc629eb76ad SHA-256: 2294d414c367fe26005d5b637dd39675b8684825f9a08c5a76fec4d003c615cd
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 0.9992

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://trafficel.ru/strik?utm_term=%25D8%25B1%25D9%258A%25D8%25A7%25D8%25B6%25D9%258A%25D8%25A7%25D8%25AA+%25D8%25A7%25D9%2584%25D8%25AD%25D8%25A8+%25D9%2585%25D9%2586+%25D9%2582%25D8%25A8%25D9%2584+%25D9%2587%25D8%25A7%25D9%2586%25D8%25A7+%25D9%2581%25D8%25B1%25D8%25A7%25D9%258A PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449775/normal_5fa349f9252e1.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/1739515.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://dirizosak.weebly.com/uploads/1/3/4/5/134509825/peridisokux_kafugoruxexis_zajanug.pdfIn PDF document text
    • https://wezukanedipewor.weebly.com/uploads/1/3/4/6/134602888/kogovi_subadut.pdfIn PDF document text
    • https://boxolajabamofi.weebly.com/uploads/1/3/4/3/134356625/08f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f96a0f2d5fc2.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/c94c9596-4ebe-4c27-b459-12e512344206/37032109218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a2169f-43f2-46e7-ba1c-ced22271cec3/to_appropriately_complete_a_consult_request.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d363160d-6ced-4a62-946f-ee204735298c/valavixejulesodifola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ff159c-e45c-460a-8ecf-81c1d90050ea/62787008166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a0fb8a-3cee-4f11-b1d4-cd094f9a1b5b/800966186.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000147d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x147D1 32716 bytes
SHA-256: 957f7b96160302afcc025369e56dffc5a2587278cf9386deb29f15c8d29745be
font_00_sfnt_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 4068 bytes
SHA-256: eeb5e31d71f00cead1fc940f0cd48c64d31cc2a9b3bda03c141aa0d4294f0e86
font_01_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 9956 bytes
SHA-256: 8a9609e251fe84feb88189b52854f52d232aa37a1c715182c2b5917ef563f086
font_02_sfnt_off00012b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 18472 bytes
SHA-256: 60ea3d442370bea1f57e9fad26609680b92e612a035e8d7a251214658e7e5c7a

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