Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e222eaea5f0b702…

MALICIOUS

PDF

86.8 KB Created: 2021-03-20 20:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6fcb64e31c38f7bf7f878267b17183f6 SHA-1: 906006f14c4f1e07ae38dae666251da3b4eace47 SHA-256: 1e222eaea5f0b70285d1dd4fb9d3fd8660bdc6cf6570f51898d7ef5f487631c3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/123?utm_term=flyover+bridge+project+report PDF link annotation
    • https://cdn.sqhk.co/fumamimed/3bHokIO/terminal_server_remote_desktop_app.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/95732222825.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/eoUwjhX/mamanelufupudofaweku.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/10241418033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ada6c45-9e8d-4063-9633-40b9e375d9b0.filesusr.com/ugd/9a7afa_f36011a8928647d98943cb0fdd847ecd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f9106d-f7d4-466f-9371-9b492bcbbe39/toyota_forklift_parts_san_antonio.pdfIn PDF document text
    • http://zuzasuzojenox.epizy.com/59824089924.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_2337716ec59549adb540afc5fc508332.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5cc3481-d347-4d24-a2b0-3adc1589b6ba/sukedibagolamevit.pdfIn PDF document text
    • http://nufewaruxemo.epizy.com/62278897045.pdfIn PDF document text
    • http://vudadepaw.epizy.com/myers_briggs_personality_types_test_official.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a514579-cb36-4ddc-9007-4604dfa7f372/sullair_375_compressor_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f684158f-ed48-4c9b-93f8-618b92242e2d/dimijedapivogujifewobaz.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_4aa7e2e60c85432fb958c632465a0070.pdf?index=trueIn PDF document text
    • http://voputujewijozej.rf.gd/cost_accounting_powerpoint_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee44967c-f545-4b45-b7db-38e488f75c06/macbeth_act_4_scene_2_quote_analysis.pdfIn PDF document text
    • http://sopazanit.rf.gd/rizudumakik.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_1c51e5b76413422195296ae10b158998.pdf?index=trueIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_85d4d5f6763e402d972a01775116b944.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E0 5188 bytes
SHA-256: 11039b1257729b7ef4c4549f918e91516b6504f2ebd4adaad112f4faa64895d1
font_01_sfnt_off000127ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 11312 bytes
SHA-256: 81697c39e539e27a112ef344a7d2876e005b3f6664f21476477c6d9716090f23

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