Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec2059fde14355c…

MALICIOUS

PDF

75.1 KB Created: 2021-03-19 13:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bfbe5852549f9bc898f06fbdb7f0a6fe SHA-1: f8c1f49aadd7fdecc7fd35789816b88bee191e7c SHA-256: 3ec2059fde14355cecfb87e6838ddae58263c13b4ea54eb2187dd6fa51633d6e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous embedded URLs points towards a phishing or content manipulation attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=continental+math+league+books PDF link annotation
    • https://pudebotajiv.weebly.com/uploads/1/3/4/0/134012430/4936405.pdfIn PDF document text
    • http://papotupeti.iblogger.org/why_wont_my_samsung_ice_maker_reset.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/daloripikos-winerejorur.pdfIn PDF document text
    • http://lesibixubivazo.22web.org/dell_latitude_3400_specs.pdfIn PDF document text
    • https://siviwoxepigomuz.weebly.com/uploads/1/3/0/7/130739754/1298977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zedudo/scope_of_employee_absenteeism.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/2007_mazda_cx-7_reliability_rating.pdfIn PDF document text
    • http://rotanejepajedef.rf.gd/abacus_15_user_manual.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_f827766b533f4bf684bfa364d6972952.pdf?index=trueIn PDF document text
    • http://baxutuzimux.epizy.com/nadogevafex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51361f3f-1260-4b90-a7f8-b4deb7d7f1a0/sintomas_de_trombose_venosa_profunda.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/iis_url_rewrite_module_2._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d4751b-44b1-4973-a9d9-fcfc4ccfb948/numipovobo.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/gisunaxilitizazeze.pdfIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_8fa4cdb57f1c4fe9be7cf9012142106f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae18067b-e2f7-4a8c-a0d1-89b2398668f1/lutudogixov.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/national_cad_bim_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/22954051105.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/ayyappa_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/dejilipakajinajatugapiv.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_off0000e495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 5112 bytes
SHA-256: 58dd7617c026b3335dce6890ff1e0f5f45ff80cfdab2cb9827e5b697056fa5bd
font_01_sfnt_off0000f5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D4 11792 bytes
SHA-256: b5fbd2046521ee2c00a7aded98a74f55c85841aa39cc0f33f8b6e7e27a34788f

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