Malicious PDF — malware analysis report

Static analysis result for SHA-256 6558a0e8540732f2…

MALICIOUS

PDF

75.6 KB Created: 2021-03-27 17:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf049b5f06e7e0211317e94090607a0 SHA-1: 957ae5f64bb3c8f014a51579bd0a937294eb2171 SHA-256: 6558a0e8540732f23f6ab9c597c87e43e63dd8a47e08f9f7e1a8a9df4a5373ea
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for phishing or scam operations. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the primary URL 'https://seumenha.ru/wix?keyword=summoners+war+codes+june+2020' suggests a lure related to popular game codes. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

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://seumenha.ru/wix?keyword=summoners+war+codes+june+2020
    • http://ladunosim.sportsontheweb.net/navy_seals_training_base_san_diego.pdf
    • https://cdn.sqhk.co/kibukumivu/ihijq8o/asma_bronkial_pdpi.pdf
    • https://cdn-cms.f-static.net/uploads/4462986/normal_60270c0611156.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fe6178379eed.pdf
    • https://cdn.sqhk.co/gawagunikuw/OhfFige/mijobigurilavemuresor.pdf
    • http://misujupino.getenjoyment.net/wugilatomoleribis.pdf
    • https://static.s123-cdn-static.com/uploads/4464080/normal_60071ab7b3bad.pdf
    • http://gadatoreneperil.mygamesonline.org/nizajosafasudopinefodar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_0573dd895137470e86ef4de03fb03c57.pdf?index=true
    • https://uploads.strikinglycdn.com/files/735ff01b-a497-4c49-b0f7-ab970d83fccc/cuentos_de_eva_luna_clarisa_resumen.pdf
    • https://uploads.strikinglycdn.com/files/91c8417a-096b-4db4-9ac2-4c01653c5b7f/sujizojelafunasusuna.pdf
    • https://uploads.strikinglycdn.com/files/cc334b1c-7c7d-40d3-921c-9a2cd9328e3d/38484262885.pdf
    • https://uploads.strikinglycdn.com/files/a01efa79-087d-4256-a244-023ce2f0f854/daxutizirujaverazowurip.pdf
    • https://uploads.strikinglycdn.com/files/37578252-bc61-487b-82d9-85257fc4ec74/19940511718.pdf
    • https://uploads.strikinglycdn.com/files/04093caa-0eca-455f-9d7b-9bbee044ece7/72351023040.pdf
    • https://uploads.strikinglycdn.com/files/a2251ccd-0b2a-461f-aa76-05d115d47fe5/90746709973.pdf
    • https://uploads.strikinglycdn.com/files/2515df1e-b967-447d-a5c4-e3780fe2a2a9/28070200844.pdf
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_387ec586550040fc8253f4ebe291d061.pdf?index=true
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_daeb5d36027342ff9c28c1ac0d4f640e.pdf?index=true
    • 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_off0000ea63.bin
70b46f95091a8ce4aa9ea08b988a859274b9c50efe9fa73a5bd4dd31c15d3707		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 5600 bytes
font_01_sfnt_off0000fd66.bin
f19800c50e9978ce4a3ceec9f4eefa076460c289962bee93618d2e4d47690b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 10636 bytes

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