Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3af200199c6350…

MALICIOUS

PDF

68.1 KB Created: 2021-04-01 16:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: da6c4392187b7a682cfda2ff68546dc3 SHA-1: 1b1b81ea9eadf25e4f93e480b7b9db30a9599e90 SHA-256: fa3af200199c6350348f10c5c6b11fb2d2ab8c711d431b5eef36668a2b7d93e8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML and ClamAV as malicious, containing numerous embedded URIs pointing to potentially malicious domains. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further payload delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=sao+ep+13+s4 PDF link annotation
    • http://bettyloustintruckbbq.com/9794419742ljmqt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_6061dc3c46d31.pdfIn PDF document text
    • http://wizatone.iblogger.org/foam_sheet_craft_projects.pdfIn PDF document text
    • http://vengriya.space/56563476333ef1t7.pdfIn PDF document text
    • http://babysampler.com/glencoe_geometry_chapter_2-_7_answers1l1rb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fd0a4c534446.pdfIn PDF document text
    • http://maska-respirator.shop/suxexepakigesazkg34w.pdfIn PDF document text
    • http://ijmalan.xyz/rinorifuwit7ryf.pdfIn PDF document text
    • http://gobegoxox.22web.org/47049385337.pdfIn PDF document text
    • http://de-bewertung-889562.icu/81173490090yu1nx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8397141-e85a-4407-a9d6-611f76f55560/zogirokez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6186bc-2404-440c-8f0a-a1679cfcd55a/how_to_repair_apc_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ea0f1c-ac2f-4c40-beb6-38b067f14ae3/mobizen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222e753d-27b2-4c61-9a15-7a82b3a19576/vizizoxipesezupokejiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300e06fb-3761-4ede-a022-5ee8dcf33730/68616357013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900c26f5-8a94-4b08-8175-d6979fae0555/65912201350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490f8e81-6159-459b-b86f-3a42fc12478d/wobukovamolinesix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418ba82a-62b5-4fb5-bc7c-557838569b25/war_and_peace_1966_review.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_off0000ce34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE34 5092 bytes
SHA-256: b25c5ec2c0554e01b7e35620ea8f1b9b085ba5007902d764455fcd8ee3dd9155
font_01_sfnt_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 10124 bytes
SHA-256: 0ac29ce449860fec751d21de2d77428a0fd7304a446a4c099d53ee85e7130044

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