Malicious PDF — malware analysis report

Static analysis result for SHA-256 2099695b599d977c…

MALICIOUS

PDF

68.8 KB Created: 2021-01-11 16:04:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5013496757ceb7b4ba24963975ee388b SHA-1: 872ce36541dab8b55ef6c24fa21c41cc4fa7d8aa SHA-256: 2099695b599d977c64f200b14d26dd735dc085b859371040874089baa9c5651b
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 presence of an external URI pointing to 'trafficel.ru' suggests an attempt to redirect the user to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and the embedded URI are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=calluna+sans+regular+font PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477630/normal_5fe64e962fe4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_5fd1f876f2abc.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/7ghih5h/square_stool_painting_ideas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fcce36c18e39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371269/normal_5fddcc96a0625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_5fb5cccb7e22c.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/iVhifig/21315032843.pdfIn PDF document text
    • https://kojivijagidisu.weebly.com/uploads/1/3/4/0/134042347/3237329.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/sesafefanulokam/panasonic_answering_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/69007757330.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/phn_mm_ct_ghp_file_online.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_off0000cf50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF50 4840 bytes
SHA-256: 7ec79dc0013708f606c599f25e8c1e98fa996a62618820f064ddc13eb0b69580
font_01_sfnt_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 11344 bytes
SHA-256: b51c5d5dd5f19df244c1467cd8a3435871b4673acecedc60e5d3b1af8cdbab1d