Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe006ee9e8203a7…

MALICIOUS

PDF

71.0 KB Created: 2021-03-31 18:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 94106983b10e23117f33fee8485c2376 SHA-1: 5b829a1ad0584d77eaededc34ccbd7467bdb06c6 SHA-256: dfe006ee9e8203a73da6d0abe95808d95972ffbf9916a2657c08a577cf940b92
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, identified as a link farm, directing users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest exploitation of PDF vulnerabilities or social engineering to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=apes+review+worksheet PDF link annotation
    • http://sigisuzuk.getenjoyment.net/zepij.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/information_retrieval_coursera.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/biology_miller_and_levine_download.pdfIn PDF document text
    • http://dusipoweg.mywebcommunity.org/68581241155.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/botetijosezuxopozevow.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/67250887210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18030688-7b88-4a96-98ae-630f80f39207/23606625401.pdfIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_a116062360cf4515bc12053fe315cd55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/ruzupesidogidenuzimoza.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/51044069143.pdfIn PDF document text
    • http://zakefuki.myartsonline.com/what_is_the_ugliest_land_animal.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/28545996592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b347c6-0345-446a-8b48-63f1e3a1c329/vauxhall_lifetime_warranty_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdf6a67-20b9-487d-8bf3-80853bfcb8f5/14702000655.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_008a70c73d944dcdbaf0811d9cd9eeac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/in_depth_interview_adalah.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_2c72228910d94c37b8e19a65de887ea1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/how_to_trade_ribbon_links_awakening.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/77909736656.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/meeting_room_reservation_form_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a006d7c-0fa2-49d0-ae58-493be19029ab/61936342420.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/39749849297.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/firoduwi.pdfIn PDF document text
    • http://gidubabe.myartsonline.com/nafelugas.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_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 4868 bytes
SHA-256: c4a6bc8b6cbb4c0b90f116ff2608cbb8e510adf53c066c7fe24e5579a972f61d
font_01_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 10532 bytes
SHA-256: 74226a1574920ac55cd0c8a03e45614acdff17f4b6604387c711556954df2a7d

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