Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64d4edefdb8d384…

MALICIOUS

PDF

63.0 KB Created: 2021-05-03 20:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 339b983a275703a35ef900d85a8b0654 SHA-1: 5d0aa2ef14aff50e3a7f617bb69031f22d6122fd SHA-256: d64d4edefdb8d384de1470826c4a07d925555b7b127b0768c5d2bb06aea09105
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9251

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.
  • 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
  • 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://mezovuduw.ru/strik?utm_term=motorola+apx+6000+battery+life PDF link annotation
    • https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/zabugonile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6010ccb6b9661.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/9260553.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/ehbOiie/cruise_line_covid_testing.pdfIn PDF document text
    • https://josebugovoje.weebly.com/uploads/1/3/0/7/130738719/1511944.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/8085413.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/216072.pdfIn PDF document text
    • https://sewigemebovoneb.weebly.com/uploads/1/3/3/9/133997870/629631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_602c3ec34ee80.pdfIn PDF document text
    • http://sinomefonok.mywebcommunity.org/61909494552.pdfIn PDF document text
    • https://rezawefid.weebly.com/uploads/1/3/5/9/135978206/3881682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411500/normal_6007de783980e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_5fd7afe5e8761.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/mazeraga-kivat-wovazu-tamizixako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5ff94301eb9c1.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/ijdLOgd/turinubirix.pdfIn PDF document text
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/wimevorobajobasaja.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_3c22e4ed9fe44832af9e7fbe1a5f1852.pdf?index=trueIn PDF document text
    • http://jomupaz.myartsonline.com/dixirefajex.pdfIn PDF document text
    • https://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_f8a8bb25a5bd47189837d30f3b02e669.pdf?index=trueIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_c92c5564163e421a98640b3493b9cc6a.pdf?index=trueIn PDF document text
    • http://duxegejuw.atwebpages.com/clasificacin_de_los_nmeros_reales_ejercicios.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_7660bc8d5a024722b94e8104596e0a3c.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_936e212c474e46cf9b6b1a25ee462566.pdf?index=trueIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0

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