Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a20b45a9dbecaf…

MALICIOUS

PDF

71.4 KB Created: 2020-12-26 03:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b8e32b4e52549cb83822f5c6374db0cd SHA-1: bcf995f58b504a2466fc863395e80ed4ad28b6c7 SHA-256: 23a20b45a9dbecafc9c5fcfece17cf0f4d52aeda2bdfd91cb0cccfe1d8525478
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains text suggesting a lure for 'Dope wallpapers 4k'. The embedded URL points to a suspicious domain, likely serving as a landing page for a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=dope+wallpapers+4k PDF link annotation
    • https://cdn.sqhk.co/fokivetezabu/QgfVhay/loguvudifara.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/jgjhgha/strategic_thinking_skills_great_courses.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/Fpgcjsx/tojij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/feseni/conjunction_worksheet_for_class_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80a42cd-f485-4ec4-88f4-2b59a31cf60a/87413036917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7ebd17-f49e-484b-abb3-66a31acb0b20/ccsd_15_calendar_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/emulator_ps_vita_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/sks_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/the_everyday_writer.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/lukaviwojarulud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23786a81-9be9-4b78-ab4c-72c11c5c0354/foxetujofewakefaki.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/97814954049.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/kantar_media_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2d14fc-60c7-4873-bb39-5ee4f632dfbc/vajusolukurekulijidi.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_off0000c2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D5 5056 bytes
SHA-256: 93e0564f4e889701484aa106f8afb7cf9fea49434b35e64e90092d79e46a745f
font_01_sfnt_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 12216 bytes
SHA-256: 16852271601604f945c63567b159a525f432e67e1712990103e9f7f378f1f68c
font_02_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 16060 bytes
SHA-256: 8f676b3be356e2086f34f7c81dd3575184be90372cbe0b4aaba7ba30be3377d2

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