Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cfa883ca563704…

MALICIOUS

PDF

71.1 KB Created: 2020-12-25 19:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0c170cf10d57b51bb53f28a9904f9d19 SHA-1: 71c271bfc3aa4e2f0829b375c74a33c089c23590 SHA-256: 38cfa883ca5637045893f3c4a312ccb382ac9308b34faef75db41704a2da005d
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan and by an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain metadata related to the URL's apparent lure. No scripts were extracted, but the presence of an external URI and the overall detection suggest an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=hero+xtreme+160r+mileage+in+city PDF link annotation
    • https://cdn.sqhk.co/letowajaf/4sKggcs/nuwebilaxewatelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468572/normal_5fa50d438e52c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5fb01925a4faf.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/1iEYhfi/word_stacks_level_1557.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/nFeYhiv/67304762682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419191/normal_5fc49b14f30d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5fd7aad644a2f.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/b91a5f0e-c3dd-4e5e-a27d-d44c6ddf18e3/advanced_download_manager_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef5f342-5d72-46f7-a87a-98fb609e1f9c/fs17_spectacle_island_ferry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49337d7e-6e9f-4624-927d-038a52153ce6/331638121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d6874e-b309-4605-ace0-4bbbe84a0278/40698860912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c278b998-37a8-4d89-a4f1-89d33f1588c0/lixakerosadebikabilusivin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd9d2e4-80b3-4e6a-b2ed-0bdf67496e8e/lovofavogoziwekupupik.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 5420 bytes
SHA-256: bd97e1e02f8bebab52114af5a5adee0869165d99daad4bce87ee14c6851dfe36
font_01_sfnt_off0000d3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A6 10872 bytes
SHA-256: 5944b434305f7d83aacbf1fcce14a8b50f87137913b69a9e13ce2f55ca7fa65a
font_02_sfnt_off0000f8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

Open this report in the interactive analyzer, or submit your own file for analysis.