Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3823c3e52ee8dc…

MALICIOUS

PDF

70.5 KB Created: 2020-11-18 08:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 18c5a39f1e6f4821476c7b82b0123ec4 SHA-1: 1f2cab9a0e29b0f24c7cce291efa7570856cac0b SHA-256: dc3823c3e52ee8dc3abfb1763c3d6d469d14c44444b82e033592280b6728a1a7
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely intended to lead the user to a phishing page or a download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/123?utm_term=cosmic+perspective+pdf+download In PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/terapil.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/libobefavidud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_5f96eb13395bf.pdfIn PDF document text
    • https://dazutogu.weebly.com/uploads/1/3/4/6/134649144/5028661.pdfIn PDF document text
    • https://jerewetazawupej.weebly.com/uploads/1/3/4/3/134384555/gisofax.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/xoferuzu/mamivexiruwebaroxiwefoxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3075b9cf-9dec-44ed-a6e6-0a2e809bb2fb/dragon_quest_viii_3ds_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813fabc6-584b-4349-828d-49775d625ced/naxisidekeduvegosisosa.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_off0000d534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD534 5360 bytes
SHA-256: b68623d81a3edf2977a21f5c502d1c1bbbabe4a17ee492119d9c0efa1e0a8131
font_01_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 11316 bytes
SHA-256: cefebc1bbaabc12ee432deca8ce23895997fec1ea4a4c12218a5eddefc14f91e