Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc596050c8e165f5…

MALICIOUS

PDF

74.7 KB Created: 2020-12-18 04:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4a6e705c27629d4a157ae6adcb611c39 SHA-1: 4cd3d887b96a67d8832c6b51816c373ec67eb713 SHA-256: dc596050c8e165f54577f43afd301b2d2d6641de34babd62761fd40e30482f65
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafficel.ru', which is likely part of a phishing or social engineering scheme. The document body, though heavily obfuscated, suggests a theme related to 'socially irresponsible companies', likely a pretext to drive users to the malicious link.

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://trafficel.ru/123?utm_term=socially+irresponsible+companies+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423728/normal_5fcc5717381e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fb2f6981ae0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5fa3cc2f2e1d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464995/normal_5fb6a587569f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fc863cda84c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_5fbeaad7a5966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5fa11615e3239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_5fd69fda7b145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fad539cc1144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_5fb47fb4dd4a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fa17d697795d.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/becbd315-984b-4f17-a1d3-3db4e1150b3f/my_singing_monsters_hack_no_survey_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ebaa44-6c39-4b31-bc14-a979bfb366df/transitive_and_intransitive_verb_wor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2911b968-4424-4020-ac76-a06394abe230/26962944016.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 5904 bytes
SHA-256: 161ac986dc13207966327cecba5dfb59dad54525fb7d929e2af8e058e87dcb87
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000fa68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 10260 bytes
SHA-256: 8ac2daf3ece4df117768323407b2b7fa1cba7ba4d95e0c4218ebd8e24deeff24

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