Malicious PDF — malware analysis report

Static analysis result for SHA-256 11531fb4b49af6a0…

MALICIOUS

PDF

69.9 KB Created: 2021-01-04 00:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2fbf85ca91253b7fc901f096d3247427 SHA-1: 9571c93d24f2df9405709bfdaf7c26d960215516 SHA-256: 11531fb4b49af6a0f09f4954be1faaa9d4756f3e3a6d1b478243305e47e3e9c4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffnew.ru', which is likely used to redirect the user to a phishing or malware distribution site. The presence of multiple embedded URLs and the PDF structure suggest it's designed to exploit users through social engineering, possibly as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=homestead+aquatic+center+chapel+hill+swim+lessons PDF link annotation
    • https://cdn.sqhk.co/peretudiwi/jiDwbhb/wewepogavazavusazaxikiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_5fe6edbae4582.pdfIn PDF document text
    • https://cdn.sqhk.co/mozesefoso/BjdhaLP/sugoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fe6ae74a8f6f.pdfIn PDF document text
    • https://cdn.sqhk.co/pusutekexu/jbjg6gi/famuxipudaxigakona.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/16d66d43-f13a-47bc-a5b3-2752bcd8f1e8/ennai_thottu_alli_konda_song_downloa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065825cb-435a-4035-8025-329174c0772e/wizupelalawupidipolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ea7d94-2f81-4efe-8250-61237b6cf1aa/naomi_klein_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca1c4e0-74a1-4ef8-927c-fa89add86b54/57183812739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f91f2b-a9ab-4084-9086-228a8d47a5d6/used_book_stores_winchester_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd99d2dc-510c-4cd8-89b0-9b094e1e9067/gopewe.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_off0000d2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 5492 bytes
SHA-256: 64b2420330a9a5363290f4cf8b46a04da7eb3f99c80be9abd2d85b3240907d4e
font_01_sfnt_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 11028 bytes
SHA-256: 254c13f976438eb6a3ac75287e404d1a2344ede4c84a4b9c80927c694e5baa64