Malicious PDF — malware analysis report

Static analysis result for SHA-256 8775228a8c8690d1…

MALICIOUS

PDF

85.2 KB Created: 2021-04-28 04:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 26543ccd536cc157cd497d26652c60d8 SHA-1: eba0718bfb806ff57d656e32c7f2206462bd5c58 SHA-256: 8775228a8c8690d16b7786006b5ddca7408b4be588315d9cc6028558f0e1c34d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one critical heuristic identifying it as a link farm designed for SEO manipulation. The primary malicious URL, https://lozipotod.ru/strik, is likely used for phishing or to serve a second-stage payload. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://lozipotod.ru/strik?utm_term=jorge+bucay+cuentos+para+pensar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5fee2f7249cf2.pdfIn PDF document text
    • https://mapadubedebo.weebly.com/uploads/1/3/6/0/136095435/2671779.pdfIn PDF document text
    • http://service-hire.com/6712162144570kxx.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/1312911.pdfIn PDF document text
    • http://galoomer.online/lord_of_the_flies_chapter_9_reading_and_study_guide_answer_key04zty.pdfIn PDF document text
    • https://zexexidiwe.weebly.com/uploads/1/3/5/3/135330220/964239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_606d2c1e8062d.pdfIn PDF document text
    • http://profyhouse.ru/nuduzegeredemnqkf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416140/normal_6056815e6b82d.pdfIn PDF document text
    • https://jitegolugitu.weebly.com/uploads/1/3/4/6/134643776/wunosepex_vavivobubaxusag_juvologavove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_6068b71adb130.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://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_e96a72a4fe2a4870a9d7287d5d5f9d52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/inter_parliamentary_union_report_2018.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_aa6161b03a6a4873a8f66bebe987b2da.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_abd0fd6392d140c2887e262f18db324f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/lizawadukerilozop.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/getubatek.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/how_to_get_a_ham_call_sign.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/twilight_saga_eclipse_cast_list.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_2361cbbdec4646c9aba434b2b8077055.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/acordes_de_piano_para_canciones_cristianas.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/formal_letter_format_for_college_principal.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/nugitotejitumegidavixig.pdfIn PDF document text
    • https://311919ef-92bb-434b-a93e-382c1a5e2e65.filesusr.com/ugd/c893b4_091962b9724c465cabe49204af104071.pdf?index=trueIn 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_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 5136 bytes
SHA-256: 13036d0567ebb6e18812e379f25ea837d34339792a3bc856a07de3144664f852
font_01_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 13720 bytes
SHA-256: 1ff9fff076b414ccb4204411c8395149be8904bf5efddc056577e3f8e58b344e
font_02_sfnt_off000137ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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