Malicious PDF — malware analysis report

Static analysis result for SHA-256 63243e9139e63e78…

MALICIOUS

PDF

75.7 KB Created: 2020-11-25 09:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 127cc9642b7cdae6ba9f9cdb91250749 SHA-1: 389bd882afbaa1a2af03537cdfac04a5bda2bb60 SHA-256: 63243e9139e63e78fcadb66dc7939b54f68e356e302492112e2e74a0e94dd57e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an external URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The presence of a link farm heuristic suggests an attempt to manipulate search engine results or distribute multiple malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=frieza+power+level+1+million PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5fa3220aab4c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381536/normal_5fbdd7eb67508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fb97dafcb292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5fbd961bdc847.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/df48c6c0b889b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f9b818b63612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f917e8622829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5f98470a576b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f9928daa7052.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/81022659-ff04-4841-8fda-b440d72bd63b/76819885162.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/cashflow_quadrant_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/bob_marley_exodus_full_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9c3f87c-1786-4546-b8e0-2656b544a938/naruto_action_figures_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/72497328291.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/13490384838.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/ansi_c_dennis_ritchie.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_off0000c96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96A 9840 bytes
SHA-256: 8b3898f61b1adc8a7c438834ee532586298e66fe4978e2fcf54aa9328802d08f
font_01_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 4996 bytes
SHA-256: 89cad7e412845dda18fb67107754ace9a4372b9ddcbac3b17262620ae4f2bed2
font_02_sfnt_off0000fb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 11008 bytes
SHA-256: 23b399b13dba697ddb5ed7bc3435f50f7e5c460f802fbcd17588edcd5a3a80c9

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