Malicious PDF — malware analysis report

Static analysis result for SHA-256 906687e4513fd5c4…

MALICIOUS

PDF

67.4 KB Created: 2021-02-11 21:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e4358a07c7879d257be1f7ca06707b6b SHA-1: a2572e5db2b2ce3608d7000dc2010a71b85be472 SHA-256: 906687e4513fd5c473357f554217852c969c9ddca7fb0e4e0f1ca0b4eb5dc02c
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://baarspo.ru/wix?keyword=concentration+commentary+examples', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'concentration commentary examples'.

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://baarspo.ru/wix?keyword=concentration+commentary+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495841/normal_600f81da1a4f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fff304986edb.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/ibNiecO/sotup.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/ox1C1hc/3d_bowling_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_5fd93a028b420.pdfIn PDF document text
    • http://masito.space/johns_hopkins_internal_medicine_boarw6rgd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fca5f4923a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418191/normal_60075fb464277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455178/normal_6021a56d717dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_5fddce5960210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fc59c4f616ff.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/tawosutosuxi/dslrbooth_templates_mega.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_off0000cc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC31 5156 bytes
SHA-256: 8a6f7d753334fee564112333a3728db86390352927df5e33a51d6fef093df0d3
font_01_sfnt_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 10240 bytes
SHA-256: f54e70edd85b2bf2acf8bb1c8f682d5b357ba135050dab53ccfca6a5db38a404