Malicious PDF — malware analysis report

Static analysis result for SHA-256 025fcbf41e41abae…

MALICIOUS

PDF

106.5 KB Created: 2021-03-28 14:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 93864a9d58a8e8c66cfb4af6196ad7ac SHA-1: 85e7e109f1c6f14de07002a223bb2dccbcd79930 SHA-256: 025fcbf41e41abae71acca9621601f2d12ff0c28484fa213c3836d3d39b5fe86
156 Risk Score

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 0.9991

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://druttle.ru/strik?utm_term=what+is+the+wps+button+on+my+belkin+range+extender PDF link annotation
    • http://xamoxipuwizutux.scienceontheweb.net/nurebazijakepopejo.pdfIn PDF document text
    • http://metaleagle.ru/xatadupopejavorsvxr.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/zijubefusujopelefegap.pdfIn PDF document text
    • http://idealicacolumbia.site/what_is_the_purpose_of_an_mou1p9my.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/why_does_my_nespresso_machine_keep_blinking_red.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/hp_photosmart_d110_series_driver_windows_7_64_bit.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://limecash.xyz/2683030378ud8ob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_95dacc05185b408b922049d44ee6e2b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/09_honda_accord_maintenance_schedule.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_283858c22bf94b08b90240012a701355.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/olx_pakistan_apk_app.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_48cb73441d9b4083a6db71536144f379.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/how_big_is_40_by_30_cm.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/65678469342.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/steven_skienas_the_algorithm_design_manual.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_9cc2aea6a02245098f840f799d37e897.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/rarosanunumirikuwir.pdfIn PDF document text
    • https://b7c6a474-53ed-4139-af63-4b2f501ae0e7.filesusr.com/ugd/e87294_4d45eb0d5cb849f59026024e60c3f9f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusabifef/50307830795.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/aviva_stakeholder_pension_application_form.pdfIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_f7b3836e19e14e7f8459b58461b4c2d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/98830413336.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/xosimetuvaziletixixamo.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_off00015f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F99 5852 bytes
SHA-256: c0dab4b83647c9552050dd7dbf9c0bce1fa962823d6177edfb5d60e1aa1c5a93
font_01_sfnt_off00017376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17376 11352 bytes
SHA-256: efc0527e908aba1701cbd4fdb8034682b67f97b2363506713097982dc9ba03c8

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