Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9076479dd71258e…

MALICIOUS

PDF

83.5 KB Created: 2021-03-21 21:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a56cca296fa0f3166f2e426129eaf22 SHA-1: b099b70c0beaaf659759b8ba3a5b19aadf1e57c3 SHA-256: b9076479dd71258e5bf78af4c9503e8f7c887057589334fc6f6b502a1c7de151
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 0.9992

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/award?keyword=mckinsey+case+study+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/woluzadeviv/lfBBjbg/quicksave_for_instagram_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/Ahiicgj/27372224176.pdfIn PDF document text
    • http://nipugupaf.22web.org/oxford_botany_dictionary.pdfIn PDF document text
    • http://dulexip.22web.org/safilitujemokipumeruval.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/j8giHgi/my_mount_nittany_health_enroll_now.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/folexapurilowe/additional_mathematics_form_4_chapter_6.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_3ec8a2e3b3f2446ca618ac79d7de5b12.pdf?index=trueIn PDF document text
    • http://guzeberipavol.rf.gd/bezubaan_ishq_movie_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/94834703186.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/akbarnama_in_english_free.pdfIn PDF document text
    • http://wumevejuraluxe.rf.gd/itr_acknowledgement_form_2020_17.pdfIn PDF document text
    • http://konivad.epizy.com/does_none_take_a_plural_verb.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/android_studio_3._4_features.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/47873957267.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/wedividizadinodowanow.pdfIn PDF document text
    • https://63209029-b609-4f89-80e5-af59b408cdb4.filesusr.com/ugd/0713e6_ad0687877cdf4ddab9923bf92166ba41.pdf?index=trueIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_0db3e47ee7d14f00a02a9b604ad882c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/editable_certificate_template_design.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/easy_vegetarian_indian_food_recipes.pdfIn PDF document text
    • http://ganenimipoje.epizy.com/23772785099.pdfIn PDF document text
    • http://dibulorofo.epizy.com/paxupumib.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/addition_and_subtraction_mental_strategies_worksheets.pdfIn PDF document text
    • http://viwivebobip.epizy.com/brainpop_lymphatic_system_quiz_answers.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_off000108ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 5444 bytes
SHA-256: b2f90cd87ae2891bbc713d52966dade7b40e046bdd6671015f5e2e3254e8f4ee
font_01_sfnt_off00011b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8A 10768 bytes
SHA-256: b232322b352f96d1bba6f9b2c31581a0bd763949ec4262e0b2a65e49b0a8dcf5

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