Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ce17df3fe2dd22…

MALICIOUS

PDF

86.8 KB Created: 2021-02-21 08:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4dd7cd49b9dd4ae99ac88e6a7bb64d05 SHA-1: d66706863d24e5b802ca8d0812f11408e1cd0732 SHA-256: 44ce17df3fe2dd2292744d2c5387f35b9357486f922216796e73d5b931e65314
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary links points to 'https://leonvi.ru/123?utm_term=freud+mourning+and+melancholia+hamlet', suggesting a potential SEO manipulation or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via the linked PDFs.

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://leonvi.ru/123?utm_term=freud+mourning+and+melancholia+hamlet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ff7ea1c63dfd.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/hcviJgf/varefuxewibugefonaromas.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/jNjjJlB/12198827814.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/jmRDZie/screen_time_android_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479235/normal_5fdcb87922963.pdfIn PDF document text
    • https://ziriponu.weebly.com/uploads/1/3/2/6/132696112/9826241.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/qBQidr8/fruit_slice_fruit_cut_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/IbgeibX/math_cash_solve_and_earn_rewards.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/jg0WdLF/33657114185.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/Y70jhgg/dugaxuripopubomo.pdfIn PDF document text
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/fapuzosulodopu-demetikiv-wefukezorabolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_6027f2e336708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fd071fd0b7f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_600e59ce78eec.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/4129639.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/ggghtL9/lesetulinejoxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375908/normal_5ff7aa498a31b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe21b9d4dc2f.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/kavugusepe/66343546775.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_off00011a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2F 5132 bytes
SHA-256: 3ac25e5d09ada6864dcb8f04dbe232e1e77a0617c2811a2985a2f17d9c50e492
font_01_sfnt_off00012b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B76 10128 bytes
SHA-256: 9a27375c71e39033492f7a5cc448e77630f8b162ea22877a60b31e9730bcee6b

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