Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ce14ab00996039…

MALICIOUS

PDF

86.4 KB Created: 2021-03-06 01:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3c2dda6f748269bd484317d8f2849ee2 SHA-1: 9f51c6868c66964d959f4ec8f586a6b3b87c016a SHA-256: 70ce14ab0099603952ffd31f05040b466b788855eccc5279e83429c6dce46fe5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=which+is+better+medical+billing+or+coding PDF link annotation
    • http://gonosijotu.iblogger.org/what_happened_in_1500_in_american_history.pdfIn PDF document text
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/72172.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/vijuduvob.pdfIn PDF document text
    • http://lamigix.iblogger.org/60616552439.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/network_support_interview_questions_and_answers_for_l1_level.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/jopekazulesi.pdfIn PDF document text
    • https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/67e32d771cea6f.pdfIn PDF document text
    • https://setasavapu.weebly.com/uploads/1/3/2/6/132683041/dapesevabad_pamaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4eda4384-4a91-4711-a072-3a378a113454/52072047190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a730fc-c5d0-4f22-93d0-f4fbae32ed0d/artemis_fowl_series_book_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fa809e-9c90-4676-a6e3-9c55addaca0a/mutage.pdfIn PDF document text
    • http://makuwuwamev.rf.gd/kindle_reader_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77145cc-64da-4da4-a386-7bba9eb1cd4a/vupuvabulobujugiwasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def874ff-02d2-4dc9-a701-875d30351e8c/junasanorubax.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/roriret.pdfIn PDF document text
    • http://wulimazef.epizy.com/xoramifusaremowaxopa.pdfIn PDF document text
    • http://faxumev.epizy.com/65956333857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707e08ca-61f9-49a7-a6c0-20d1eaa8da4c/how_shadows_move.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 5296 bytes
SHA-256: 87c32e7e15417924098dae18420335531fd4a799141ddc96ad35f3643dbbbff2
font_01_sfnt_off0001183b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183B 11208 bytes
SHA-256: 474ae59ca676f1d4e8ea200a48f55e6c0bff4edbefec2315f51a87bf9c82a3db
font_02_sfnt_off00013e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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