Malicious PDF — malware analysis report

Static analysis result for SHA-256 6668adf7468bebce…

MALICIOUS

PDF

61.5 KB Created: 2020-11-19 23:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 148e33cdf1fbc16bdeb878627ed508bf SHA-1: 34a5e95ef3e31e9e48be6132d199657ebec6e865 SHA-256: 6668adf7468bebce10b6ff91a513c49e25366c13b645a55d933fd1d6534102cd
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files. One of these links, 'https://traffnew.ru/aws?utm_term=motorcycle+chain+guide+roller', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/aws?utm_term=motorcycle+chain+guide+roller PDF link annotation
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/bedudomodunego_tizoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_5f9ddd2138d46.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/dubalukam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/rifts_adventure_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d0e1e8-3ecc-4449-9e17-b67b944a98c8/smart_bracelet_app_set_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33638943-5f67-4905-8c12-536d06d0d1ae/utorrent_hzlandrma_kodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a79319-1805-4b24-8406-7c908e6a3e45/bootstrap_bill_turner_makeup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d38951a-aa72-4f47-90d1-107483a380ec/muxuwamoravejufev.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/bexopik.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/71687325839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be103e5-b18d-402c-8c81-4e5e4980502e/samirusududezelotifisujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a08c60-f26c-404a-b7f4-e61072140597/35922691497.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_off0000b52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB52B 5132 bytes
SHA-256: 596811a0af8c45bd772d86c4d60defd5d4d2a71020cf16b796c9345f0c94c8f4
font_01_sfnt_off0000c6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AA 10188 bytes
SHA-256: 3b7440ef9a10fa8f3442fdb8d362f0217620a64c2691c86988ed11d930f8383c

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