Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5cd4987b0948d5…

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 21:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf05f9a48f54c6c1b3191c6471c0ea83 SHA-1: d74e4b12eee0c74035569310047cf05d46c195ee SHA-256: cd5cd4987b0948d54f46846a47091bf4a911554abd5882aa6f830ce0053a3d75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/wix?keyword=multiplayer+games+apk+mod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467032/normal_60089b7268818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5fcbe4bec6d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_5fda20d685e43.pdfIn PDF document text
    • http://compte-cmbretagne.best/46897726294ka638.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/coleman_furnace_ignitor_replacement.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453885/normal_5fcf77505c197.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/algorithme_ofppt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5ff8486e0dc65.pdfIn PDF document text
    • http://nekretnine.site/oraciones_con_sujetos_y_predicadoswo3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_603e70345e6e9.pdfIn PDF document text
    • http://natbeach.space/game_resident_evil_apk_data_obbgez2a.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/pizusuzapipob.pdfIn PDF document text
    • http://milanbeach.fun/535977474592jpp8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fe8f953b7935.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/jorezefobaromezofug.pdfIn PDF document text
    • http://fruitik.space/90763012805qck85.pdfIn PDF document text
    • http://mowukedova.mypressonline.com/56230019764.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/80b66b54-298d-4afb-b398-e86d09761430/how_to_read_a_poem_beginners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78bc58f4-2918-4e84-a0e0-8e041adeb76c/40750254578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3ecdc8-3114-4f9a-b0c6-703e165710cd/xevuvumikaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852e76ae-5c1c-4830-98b0-fb67a1eb5a83/how_much_should_i_charge_for_online_english_lessons.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/fanireg.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/email_html_form_app.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/rumegid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fb53e8-392d-4fa4-8581-d8abc7400576/how_to_fix_garage_door_opener_light_socket.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_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 5452 bytes
SHA-256: 4d75b5d9ed41113f0ea26b28aae9a4008214cc94dc7fe2e078ed6cb8aaf9d36a
font_01_sfnt_off0001069e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 10684 bytes
SHA-256: fbef0fae7013b9a5f0699cfcdd9433ea82a26174aad926477b350e3c862cac83

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