Malicious PDF — malware analysis report

Static analysis result for SHA-256 3547841d185cc8d8…

MALICIOUS

PDF

80.7 KB Created: 2020-11-24 07:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 835949fe7761a74d4b3c1eff54a11557 SHA-1: 1bfba55f180ff7d12ed78ed897f7c1353e9b9c90 SHA-256: 3547841d185cc8d848feb8f89ae1c7b65ae63da556b3eb223ef85d6802ef4c94
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'traffking.ru', which is likely a malicious domain used for phishing or malware distribution. The document body is heavily obfuscated, but the presence of the external URI and the overall detection suggest an attempt to trick the user into visiting a harmful 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://traffking.ru/aws?utm_term=android+studio+project.+properties+file
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f95d3223b7b9.pdf
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f9f2ebcf16b0.pdf
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5fa2f97482e30.pdf
    • https://www.bantex.co.za/product/polypropylene-lever-arch-files/his
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xozeb/jurnal_bilangan_bulat.pdf
    • https://uploads.strikinglycdn.com/files/4e2cc7c1-cdb1-4ce9-9a51-27c3c1ce7258/49519218751.pdf
    • https://s3.amazonaws.com/kasuwevovog/applicable_large_employer_worksheet.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/free_coupon_book_template_word.pdf
    • https://s3.amazonaws.com/nijosinizo/instalar_aplicativo_netflix_para_android.pdf
    • https://s3.amazonaws.com/lofese/finadituromoxuvu.pdf
    • https://s3.amazonaws.com/faluzotixupi/19180093818.pdf
    • https://s3.amazonaws.com/tokit/wsjt-x_2.0_user_manual.pdf
    • https://s3.amazonaws.com/jepavilutabilel/ssc_nic_in_result_2019_gd.pdf
    • https://uploads.strikinglycdn.com/files/8020bfdf-9ebf-4fdb-b091-3abe5d780d28/89160112573.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd43.bin
9f00e4523a75a150469644c4f9a527fae1e0dc74bf506942fa69053cd19616cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 5036 bytes
font_01_sfnt_off00010e89.bin
5a97a06f1d7841ff82a6935aa01f7e396dd776f80db0dba60bdb30c1d0ebb47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 11352 bytes

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