Malicious PDF — malware analysis report

Static analysis result for SHA-256 e147bba8edee0917…

MALICIOUS

PDF

65.8 KB Created: 2020-12-31 15:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 06c20e272157358f0efea3e03c437bee SHA-1: ef95b4fc7ec40b8c6c625ffb9a6f765cabe0f0a1 SHA-256: e147bba8edee09175adfa1ac9fee75109a5a39dd8f1081af589b78b51dd5f92d
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing lure or malware distribution vector. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, preventing a clear understanding of its specific pretext, but the presence of a malicious redirector strongly suggests an attempt to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?utm_term=cadbury+beverages+inc+crush+brand In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_5f9d15074c5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5fca545d877ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417653/normal_5fe26d1c0a411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417669/normal_5f95cc98eb5d9.pdfIn PDF document text
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/difamiwafaxule-gigovufawur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f91755f4665e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_5fbf54a60d4bb.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/d7bf0bcf-a9d1-4bc9-867c-fe16e7028947/kininesubawotogig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4eae68-83ca-43a0-9a63-d14be1456903/triangle_proportionality_theorem_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad786a9d-2f3c-4b67-aef7-33da5af8df27/xefasuganapulejukutaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03526424-561f-4ec9-bb88-a30cef37f9bb/52551683995.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/reported_speech_exercises_present_simple_and_continuous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743c7316-f275-426e-88eb-06efd5fac085/richie_havens_discography.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_off0000bf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF27 5376 bytes
SHA-256: 065478673eefcc770812b81fbfd91dceda43791214d9730d1da7486f88b236c9
font_01_sfnt_off0000d175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD175 12312 bytes
SHA-256: b0883ad8d1fdab9a7df56ed61a2cc48f855655c68265db34918c049988505878

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