Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ad2d0a89fd2303…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 00:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c1bb614e894343c211eaf9541d884f9e SHA-1: 0b8d4b8c1183271138bddf2a9c65abb26379d993 SHA-256: b1ad2d0a89fd230385fc73360dd9bbb1fe7b4aa10de8deebfc28f42e75e84775
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. The PDF contains an embedded URL pointing to 'vilenefex.ru', which is likely used to redirect the user to a phishing site or download a secondary payload. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the presence of external URLs suggests an attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=us+electrical+wire+color+code+chart+pdf PDF link annotation
    • https://cdn.sqhk.co/wenewojufaj/pQijghW/29257965830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370525/normal_5fe1260079f1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473919/normal_603741d2237ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_6049060b51bfa.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ytLvghj/53554093832.pdfIn PDF document text
    • http://fabermanufacture.ru/que_es_el_minimalismoo8jwl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_60404db19ad52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_6013aeb188fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fe81a6eede1e.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/rdihcX6/gepidokibotetojuvapab.pdfIn PDF document text
    • http://dihtyar.online/forubugumet6d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_602f5d2287ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/WoPghs6/sodezilazi.pdfIn PDF document text
    • http://boothattendant.com/21204389487vnogj.pdfIn PDF document text
    • https://cdn.sqhk.co/megopofe/hibwgcY/71806911677.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/5e56e98d-5929-4907-98ae-9db85fe99f85/dewapipidazebefoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc76abd5-ab8b-466c-81cc-67598a5c5a72/92913323311.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_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 5328 bytes
SHA-256: 2fcd017a4c214fb0a85cc91e0942d50fef8c24a2651dd1bad5e09368d3abe56e
font_01_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 11140 bytes
SHA-256: aa4e2193624f1459135aca86d05924c5d45aead8d1c14a4e8cce2eae3fa5b909

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