Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc34adaef3cfe4c6…

MALICIOUS

PDF

84.2 KB Created: 2021-03-27 17:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 664d017d3ce73aa2c9497d449b6f0742 SHA-1: 75d3da479eb7cfe1fa0fd6f3ded2b0bd88216a69 SHA-256: bc34adaef3cfe4c6edde08ae12b270b22751528cfb7b1e52bc79b9fc05c78343
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/award?keyword=b+ed+cet+previous+year+question+papers+maharashtra+pdf PDF link annotation
    • http://detijiwajak.22web.org/getebizitisomebavus.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/dWhbhh6/best_rock_radio_stations_nyc.pdfIn PDF document text
    • https://xakijugikirire.weebly.com/uploads/1/3/1/4/131437514/lewani.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/L5Mhgia/82283828707.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/ojjghnw/origami_dollar_heart_directions.pdfIn PDF document text
    • http://dapabikokewe.iblogger.org/35874368614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_6046adc78a0c0.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/hfjfgj9/romikipolikotubutewul.pdfIn PDF document text
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/1f099e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_602d7873e1ed1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_601e2d4dc4b65.pdfIn PDF document text
    • https://wuvonavozaf.weebly.com/uploads/1/3/2/6/132695620/3aa2aa1ebc8d6b2.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/nimefuzizoz.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/707574.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/materi_tentang_boraks.pdfIn PDF document text
    • http://nibatozov.epizy.com/divina_commedia_parafrasi_e_commento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc75382-2c75-46b5-9d0a-941f3b6ccf68/83314531108.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/volopopig.pdfIn PDF document text
    • http://wubonaxe.epizy.com/roramusidamogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2eae498-e7de-4c5f-85dd-303a6793b504/new_jerome_biblical_commentary_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0068c9d9-41f3-479a-ada0-0762ce08d003/the_golden_rule_manual.pdfIn PDF document text
    • http://pijopatamotawu.epizy.com/simulifenafo.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/zekelukatimolagadif.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_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 5700 bytes
SHA-256: 59ca802d396af15eda16a5708240b2563a59e09e58a03a14151f798b2ab9db4f
font_01_sfnt_off00011cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF7 11072 bytes
SHA-256: 91ae4bb7186c8b395cae708434213d65dca25a29cde70b4f0b550adf5e8da2b0

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