Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d5b9d8c6d029c8…

MALICIOUS

PDF

71.0 KB Created: 2020-11-17 22:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c7372e99360e4237a477e3d6e4124a7 SHA-1: 5263a7947204be36a3ef1539ff56447a85845cf4 SHA-256: 49d5b9d8c6d029c87acd9eb1e4e608818f7c523befc67979e09ca692c3572cfc
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/123, which is likely used to funnel victims to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=carrier+comfort+zone+ii+installation+manual
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/3948262.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8324687.pdf
    • https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/degoza.pdf
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/rujaxezenudowi-roxeni-wovupipaxit.pdf
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/8001170.pdf
    • https://jibametugo.weebly.com/uploads/1/3/4/4/134486067/49ab7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a3a86a97-be53-43ca-8df9-404426fdb5d1/bawufagimozudosaviwapi.pdf
    • https://uploads.strikinglycdn.com/files/0db54c13-cbcd-48c7-874f-ccbb5401d91d/28836313105.pdf
    • https://s3.amazonaws.com/panalipolifod/cancion_happy_letra_en_espaol.pdf
    • https://uploads.strikinglycdn.com/files/023e6cae-25fb-43df-b8c4-dd0d9257bc5f/31849838554.pdf
    • https://uploads.strikinglycdn.com/files/88cb6ff0-eb75-4378-b81e-da00a2cc3b64/vuzanojaf.pdf
    • https://uploads.strikinglycdn.com/files/1466a3c5-255a-494d-93b8-642c66df80bf/entrepreneurship_phd_programs.pdf
    • https://s3.amazonaws.com/mupakijivuruzim/moxabesopeli.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cabc.bin
a57701fd681a8bcd7452c0ea75988b2294ff63ef44da5d7141df881e6dbfb4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 4980 bytes
font_01_sfnt_off0000db99.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 3720 bytes
font_02_sfnt_off0000e6fc.bin
1f058ed99da21216905bcad7bcce1702b6ea0ffc7f7fd99abc754d81bbc10016		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 11648 bytes

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