Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c95a34e372ef2e…

MALICIOUS

PDF

73.8 KB Created: 2020-12-19 01:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: adf74241cd80a8e6c1f4b26324e48b0a SHA-1: 02f0536c068f9210a43ae59f52c9f98d75ae19d5 SHA-256: d8c95a34e372ef2ee06b87508f3547fe81ae81210b72afb5025cc4738a3f679b
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a compromised site.

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://trafftec.ru/aws?utm_term=last+cloudia+english+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f93b636508a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_5fd6825fb4ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fbbccc970695.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/15980e0e-1ad9-4f94-b371-cfa4793d58d8/soketolaxojedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6053ee41-a2c0-4abd-b4d3-6f97d4892107/jugegizevidodaveketuvufig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf157a97599144ebcb235/1606283612707/is_the_power_efficiency_guide_for_real.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c70167-941d-4670-8549-1cc805ae4a73/mozaik_software_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758f0a31-fa60-437a-8904-d647c6d06027/petty_glyph_of_stamina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f93324b-3ab1-419f-b004-72e0675c8513/the_little_foxes_plot_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70e0a791da6493f683ef5/t/5fc8148626a3037b432d2d8a/1606947977420/85758797386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406813b6-e25a-4308-a89b-db16fb909053/wobezibibamuzaledarokired.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/zafenamixapanugika.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/chegg_solutions_free.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_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 5044 bytes
SHA-256: 0030357b37e63d194a700730cb0f6899d5505f999e4b2d8cda33835f9d366727
font_01_sfnt_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 10720 bytes
SHA-256: b7221d58f1e04b6621e0aee3bc1b49e531e7075c86e5d2216fb1ed77e121cff9

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