Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f21ba86b0daca2…

MALICIOUS

PDF

66.3 KB Created: 2020-11-19 00:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2a8a41d501729ffdf134b00d6f231752 SHA-1: 7f62c929d425bdcccc2f956317a078a2c3f35f07 SHA-256: 98f21ba86b0daca2194ff2139107c4874ee9c3263c0535d6c0847fe16a84b9c9
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

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://traffset.ru/strik?utm_term=an+appliance+dealer+sells+three+different PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f9a2dd04f6e4.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/a5be5f2c-fec7-463f-8b77-cc230444f942/8884734324.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/rodozenajuniroxas.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/sequences_and_series.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/guxodogefadazar.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/laderobitenokorupotubomem.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/pbs_life_s_greatest_miracle_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92a7717-fa85-498d-bdf0-7a33b34dc7be/89191837292.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/livestrong_elliptical_used.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/mappa_mezzi_pubblici_amsterdam.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/sororolesa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA27 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000c46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46A 5232 bytes
SHA-256: 32fc028498d01d81590db149c23fa0084c9116728cfc335bbd08b777591b8fa8
font_02_sfnt_off0000d62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62E 11180 bytes
SHA-256: 52758b98d7d1acd77e62013e873ba0f8425c8ed27bbc25c790b7f7a8454da010

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