Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24a1c513c5efc6b…

MALICIOUS

PDF

94.3 KB Created: 2021-03-28 15:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0100f312f6671023fcc596666da281b0 SHA-1: 9935c33abdaa5cae58c28c49c8a03fd78f268445 SHA-256: e24a1c513c5efc6bde52a8f66885836cc33af5ff5c4fb41da26946ad23b3dddd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are to unknown or potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to external sites for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=cannonball+adderley+work+song+pdf PDF link annotation
    • http://zonerokemub.getenjoyment.net/nodosogusememusodemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fdca7a418b4f.pdfIn PDF document text
    • https://todatukutazatu.weebly.com/uploads/1/3/5/3/135309816/3843311.pdfIn PDF document text
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/83500c4c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fe9c649e503b.pdfIn PDF document text
    • http://kibesamifi.getenjoyment.net/fopobigodobazadoxobin.pdfIn PDF document text
    • https://vegilirebaj.weebly.com/uploads/1/3/1/0/131070576/2362630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_602c9c7c129f5.pdfIn PDF document text
    • https://noxurawikatiner.weebly.com/uploads/1/3/1/1/131163986/5484599.pdfIn PDF document text
    • https://misajutedatid.weebly.com/uploads/1/3/4/7/134755713/zatibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://relivoziz.atwebpages.com/ornamental_plants_in_the_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42a3ddc-43ac-4de0-b2d3-09194b208da2/just_listen_age_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/fimobilubemorinesazinig.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/vamanulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892e62ed-fe50-493b-bd9b-8e0515c8eab0/pozewasaxekadadux.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/pujadabubora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b29c0a-4e41-4fb3-b3a3-296e6bba14da/serunegeg.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/2005_dodge_ram_1500_ac_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/juzovotowatodosil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abda9082-f9e3-4da4-96e0-f7519d258792/how_long_does_ti_84_battery_last.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/80651244825.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_off0001338b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338B 5512 bytes
SHA-256: 5bdb142669a1ffce7afcc1df37e7c393cd9d58692cb59b06a141847eaec43465
font_01_sfnt_off0001466b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466B 11044 bytes
SHA-256: 99cd64754cb7036962c0b718d233038041a8d1fa5738e2222079203ad87927a5

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