Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c6925b95ec0673…

MALICIOUS

PDF

74.2 KB Created: 2020-12-21 03:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 615c808b1c01a03ede835b92ad5861d2 SHA-1: 9a5828518355790737c112bc136f2c567d93157d SHA-256: d8c6925b95ec06736b28a560d925ae92e775febc8874b17d57449bfb07dda490
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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/strik?utm_term=groupme+support+email In PDF document text
    • https://vavagufone.weebly.com/uploads/1/3/4/3/134345741/walowufusosuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f93df9baac1b.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/lununixif.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/najelasidor_nofejitu_tagazadobo.pdfIn PDF document text
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/nizatifodufadewobux.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://uploads.strikinglycdn.com/files/e0ddb22c-22ac-4094-9f3a-8ca58d0a8f71/dd_human_deities.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/roxajuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/egor_zamula_scouting_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c602963-f7e7-4d4b-91e1-247a5cdbc8bc/deutsch_aktuell_2_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/hd_vision_visor_for_cars.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53E 4728 bytes
SHA-256: f0798b3ba3f205fef514747d7bef303f5d4a5d43ec1e2ccd9e25ae1e7ac09e86
font_01_sfnt_off0000d5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BE 4772 bytes
SHA-256: fab60be6f0a9acc055ca817eed9afc3f1d4e22b12323aa8a880f2edcf1f2d417
font_02_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 12320 bytes
SHA-256: 8aedb9af0829c06adf18b8e3ac1804d6f10c022562ddce2a1e1c84a5e06342ec
font_03_sfnt_off00010e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E08 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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