Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8d772ee1c97efe…

MALICIOUS

PDF

67.0 KB Created: 2021-02-14 12:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bb93eb1024381d7dda01967e1663462a SHA-1: 1dbbb7f47d2a4e6b36d89f387639c42c5461f87f SHA-256: bd8d772ee1c97efe251e9dc5727bd644e53c0e9282412842946e5d02354fead8
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 0.9996

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://crophysi.ru/wix?keyword=laramie+rifle+range+laramie+wy PDF link annotation
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/nesasozevaxadukesud.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/nuxitoxu.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/260652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_601a03e457250.pdfIn PDF document text
    • http://bupojew.22web.org/rpg_maker_xp_for_android.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/a77c0ad.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/8320466.pdfIn PDF document text
    • http://gaxotewaboka.iblogger.org/breast_screening_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bapomeguradoka.rf.gd/73164640098.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/aplicativo_whatsapp_baixar_android.pdfIn PDF document text
    • http://lesizuli.epizy.com/75418196335.pdfIn PDF document text
    • http://jodaniti.epizy.com/55361824223.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/77005766353.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/70045884409.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/bareilly_college_b._com_private_form.pdfIn PDF document text
    • http://sonunetenigido.epizy.com/email_maker_apk.pdfIn PDF document text
    • http://wanezezigemos.rf.gd/45441066545.pdfIn PDF document text
    • http://vufebadavoga.epizy.com/mikidefamomemudag.pdfIn PDF document text
    • http://galiwasik.rf.gd/pizipaliwom.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/47731693864.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/fotezadipanozibax.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_off0000c97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97F 5044 bytes
SHA-256: 32b5d59c15fe270439e31a755383f96665d19c49bdf9f58ab9ed58131cf1670f
font_01_sfnt_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 10436 bytes
SHA-256: 1b5707fadddae492480b0351f6f5ca117fd25e7efbcb403448ab363dd065e0f3

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