Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb23ef958a3609b…

MALICIOUS

PDF

68.0 KB Created: 2020-12-23 15:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 98cf35a317d46f9e3620dc94e34a3853 SHA-1: 4a2020273d652268cdfdc3831ea9be8f04df38aa SHA-256: eeb23ef958a3609b9e35b13dbc4fce7256e341946a3d8cd021da9cf75e656605
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to exam results. The presence of numerous external links, including one pointing to a potentially malicious domain (trafficel.ru), indicates an attempt to redirect users to harmful content. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it may leverage embedded JavaScript for malicious actions.

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
  • 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.
  • 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/aws?utm_term=up+board+result+2013+intermediate+marksheet PDF link annotation
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/cc55a4a2cf.pdfIn PDF document text
    • https://sodapovi.weebly.com/uploads/1/3/4/4/134494820/9506775.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/9009541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_5fbc366f75514.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mukut/kajipomorajevug.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/fsrh_contraception_guidelines_ukmec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2069458-3b08-4dd4-aab4-4fae6a5dd2b5/malafesitirir.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/83711173117.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/kagalokipibesofe.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/9650945507.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/folonapeji.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/68928321884.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/manhattan_kansas_white_pages_directory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ca2600-5a38-4cda-bba6-c3600e9a7607/natural_selection_in_populations_11.2_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE29 5764 bytes
SHA-256: 9fffc4721e63e7d1f8dd4be82107f40157e4fefb14fbe4b8e94c33486f204364
font_01_sfnt_off0000d18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18B 10428 bytes
SHA-256: 503b06a005c4402b12f475f76286625c8e5163019ace3d1c5a9927c259b56ea0
font_02_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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