Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc14618dc92cb91…

MALICIOUS

PDF

90.2 KB Created: 2021-04-05 17:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3705a2145913bc19f7c9939467a31056 SHA-1: b40bcc9ac3188d7e2ac4bca35e9630821b6d73ae SHA-256: 2bc14618dc92cb9127d2a3a6b6ed995559c2ea167b9db724debab30e83e80804
156 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 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://soxebez.ru/strik?utm_term=what+is+act+acceptance+and+commitment+therapy PDF link annotation
    • https://cdn.sqhk.co/zoxinugokas/j2hfhiV/h_and_h.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/dEgfjig/ludo_talent_for_pc_online_play.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/fajixe/is_my_epson_printer_airprint_compatible.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/68237797712.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/4419260276.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/zavosolodizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56cb7b9-c621-449d-ba48-a798e34b064b/factory_reset_compaq_presario_cq57_notebook_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3607bcd-5388-46bb-9e07-96a662b34062/batufogojuxomodevuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/mixima.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/how_to_fix_briggs_and_stratton_engine.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_b9f450bbcba04e4a8350034530de3b80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zulezov/what_type_of_oil_to_use_in_a_generac_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/los_angeles_galaxy_former_players.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfb26d9-71e6-42f6-8aad-3713abee044b/biblia_de_estudio_reina_valera_1960_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a11bf26-adec-4b42-96de-fdd0b415cc92/kaxejapeduniligumiromu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368616a3-e983-4476-a191-1834566dc17c/zubirisew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe38bde-0ca3-4b7e-b1ac-b6d38ff0ef5e/sugizimiveborupog.pdfIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_538a6acdb3c1482097e1f5573bc8bd28.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_off00012181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12181 5396 bytes
SHA-256: a331f10faa0f50aebd256e4acbd5bf872116a1c413a8fc43492de522c8261ba5
font_01_sfnt_off000133c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C1 12080 bytes
SHA-256: 54996801f3172a3d59a5ed7d100f49b7e67009992ae69851ffc9bd19769a3013

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