Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d7b8de19234b2b…

MALICIOUS

PDF

89.7 KB Created: 2021-03-12 14:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a19dc2e353beba20b1e14d3175b09d9 SHA-1: 50fd9a2bcbfb446f9a4b6240e482778174a95a27 SHA-256: c8d7b8de19234b2b4f7c01b9b918d159517a0236f84c8a507436a02d874cfbd4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://maypoin.ru/wix?keyword=what+is+complex+molecular+machines
    • http://pipvip.ru/clear_cache_and_cookies_android_appgqhdl.pdf
    • http://timelessdecorum.com/24668517150bx4mv.pdf
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/acabf184ccbe78.pdf
    • https://cdn-cms.f-static.net/uploads/4366319/normal_602307ecdb0f0.pdf
    • https://static.s123-cdn-static.com/uploads/4416304/normal_5fc66db116afa.pdf
    • https://xagomutub.weebly.com/uploads/1/3/4/3/134321984/zufasu.pdf
    • https://cdn-cms.f-static.net/uploads/4371799/normal_60303650a8bbb.pdf
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/3412469.pdf
    • https://static.s123-cdn-static.com/uploads/4491169/normal_5ffb0a8e89d30.pdf
    • https://cdn-cms.f-static.net/uploads/4378152/normal_60248aba8163b.pdf
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5fd79003a610a.pdf
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/tusukomon-xirilazirufu-folexuzel-difanaji.pdf
    • https://cdn-cms.f-static.net/uploads/4426413/normal_601b2282c34a7.pdf
    • https://static.s123-cdn-static.com/uploads/4390329/normal_5ffbe2fb38b41.pdf
    • http://circulshtangcalip.website/96927913513gufmo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a90854e-318c-4e97-a456-2992c477e00e/how_to_get_a_real_id_drivers_license_in_california.pdf
    • https://uploads.strikinglycdn.com/files/1f2d3637-4d27-40de-bab8-567d0eeab3a0/14040779101.pdf
    • https://uploads.strikinglycdn.com/files/685e1d42-b644-45a3-a818-d54a0da1e61a/rumoxojizuxavapipaxefal.pdf
    • https://uploads.strikinglycdn.com/files/3321dfc9-62db-495b-b959-ee2efcea9998/tijinukinuzibep.pdf
    • https://uploads.strikinglycdn.com/files/887f8a2a-a85f-432f-802d-225f8a1be110/tozufopesuvipewuxoxil.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122f7.bin
0047bd67a6208ff3dc25ce7bd5fd0a6b423a84c2358a0cca209c211e0bb1ffdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 5252 bytes
font_01_sfnt_off000134bb.bin
967eb4f47131f47cc8029f5f775d19261978d765b79d06ae1d60ea6a0494360a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134BB 10760 bytes

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