Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec1aef8c8bc2fd7…

MALICIOUS

PDF

71.7 KB Created: 2021-01-08 20:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a17a4c58dea2f98b907284d54238deb0 SHA-1: 6cc229c1f9ee9db35f04365a1f841bb423096636 SHA-256: 5ec1aef8c8bc2fd7cba342b5d2f43971e1dae49c41da89b97e714e4d05f8762b
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=ge+34760+antenna+manual PDF link annotation
    • https://cdn.sqhk.co/lakuziwi/hajhyhe/diskdigger_photo_recovery_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f96226e61cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fa1ad4eb0a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5f9b3ba594932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fc67ab5adf51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5fe6c58f6f3a8.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/xanebavifamopez/prentice_hall_california_algebra_1_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/41160248272.pdfIn PDF document text
    • https://s3.amazonaws.com/dirijazi/themes_of_metamorphosis_by_kafka.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/weight_training_planner_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/maternity_leave_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/tizinoxepipajume.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_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 5216 bytes
SHA-256: 48649918079cfed05712c54710d7885d61739f6019fe82bea5c52ce435a3494b
font_01_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 11036 bytes
SHA-256: 646203024f20116640e83b00e59830c2525b6b0a0b66fdeb1082f181a6773516

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