Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f0e5d1359da2e7…

MALICIOUS

PDF

73.3 KB Created: 2020-12-31 00:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c17203994ad281d1b1029c2bd80f9be SHA-1: 089c40d8681aa09fdf85a744341b49a8647a5482 SHA-256: c4f0e5d1359da2e7db191fb5d293e36cb4ad1354c4f193520e3d377c19ac5c9c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely intended to host a malicious payload or redirect to a phishing site. The document body and metadata also contain references to this URL, reinforcing the phishing attempt.

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/123?utm_term=toro+timecutter+manual PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najipavez/29432038148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c53e44b-4658-4038-8adc-a2555c6084e4/lexuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c987b27c-dc31-4f4d-b7d4-e5a87cfa4045/25138912224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2541951b-a0f4-4b67-abad-831c2ca8b838/fusixiwanerewasupudixedin.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/divewubupibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297f6e49-341e-4a48-8314-3f8c993e9e00/12639177612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76037fd3-04d1-4b11-b1e8-d921771411b2/43111853912.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/41229278149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1424754d-f19f-482b-8102-14a59254655a/broken_sword_2_remastered.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bda4bf7-82a1-472e-b20a-8fde2e1e051d/solamadofokakivol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacd7b79-f056-4dd1-ab43-22d1544fc0f3/5534290017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63253d36-7746-4f88-a154-eec354d4be17/54435901385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e3fb19-0b17-46eb-aae4-7851a461a80c/tobolapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf537be-d335-440f-b01b-3ff12341f134/kill_the_ai_mass_effect_andromeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0094f7-a49d-4527-bb63-391777dea565/77413105608.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_off0000e575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 4716 bytes
SHA-256: 870e098e2cb2e1beae7fb347223f556fd06f2d537f1a0538460e3ffeec937482
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 10256 bytes
SHA-256: e63a14961027b94bbf7852c4b0858754396e55d0d725c3e36ce54dcd1bd35d9d

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