Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12ba22e6cc46c97…

MALICIOUS

PDF

87.8 KB Created: 2021-04-26 15:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 796313b4c8a20526e3004d8f7a5c67c1 SHA-1: 593a8c26baab7688f0d872bd5da44e7bd10bf283 SHA-256: b12ba22e6cc46c97d434e3d7fda34fd3479b73c8aa330a954ac31b25b96d5571
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=how+to+be+a+machine+learning+engineer PDF link annotation
    • http://suvolupijiro.mygamesonline.org/acidosis_lactica_2020.pdfIn PDF document text
    • http://zovunegem.22web.org/diablo_3_season_21_builds_witch_doctor.pdfIn PDF document text
    • http://erogan-encolumbia.site/vajazaxajenebimuzogumdp2yj.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/soviforevoxujuv.pdfIn PDF document text
    • http://surerup.22web.org/weight_for_2010_lexus_rx_350.pdfIn PDF document text
    • http://pejagepelif.iblogger.org/69752774030.pdfIn PDF document text
    • http://prod-fruit.space/kolotoninuwnxjn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_5fd6f3dfb8f9c.pdfIn PDF document text
    • http://taduzexemi.22web.org/concepto_de_equidad_e_igualdad.pdfIn PDF document text
    • http://opensalle.xyz/lojefamuljess0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365551/normal_5fc9dcd4e6ac7.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/17060844498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_6038675bc7217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/votawawo/73535239509.pdfIn PDF document text
    • http://bapomel.epizy.com/62834555872.pdfIn PDF document text
    • http://gototura.myartsonline.com/k_means_clustering_in_r.pdfIn PDF document text
    • http://foxejozigigep.rf.gd/oculus_definition_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/wabigararumejifuwovi.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/99885388818.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/monesawugitoxodex.pdfIn PDF document text
    • http://wedojixote.rf.gd/p90x_for_weight_loss.pdfIn PDF document text
    • http://basemamexirenaw.epizy.com/le_petit_nicolas_film_summary.pdfIn PDF document text
    • http://bixodog.rf.gd/vovinixomikefob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 5016 bytes
SHA-256: 3def13af95f27142eb7a836017a3bcc51ef7978befaf0082af5507f4761528d4
font_01_sfnt_off00011d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 11148 bytes
SHA-256: b1b0819ba5ca307a31096d7d0c0a0b60c5b91ef1c83eff2b7f531fcaa08dad56
font_02_sfnt_off0001430c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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