Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc48de005e2f63b1…

MALICIOUS

PDF

75.2 KB Created: 2021-03-11 20:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a1197f218f9b38047fbb6fdef326abc3 SHA-1: 59a034c36dbea44b4fa1f6bc55b90763f1e225b6 SHA-256: dc48de005e2f63b103fd488086177956e3ee64e4762571d9b0e7fa3e9434be7a
126 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'free printable address book pdf'. No scripts were extracted, but the extensive use of external links points towards a downloader or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=free+printable+address+book+pdf PDF link annotation
    • http://piwulag.sportsontheweb.net/lenojaxubemajugunuzu.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/mesidarivowozod-mavidekemajiwe-zegugugow.pdfIn PDF document text
    • https://cdn.sqhk.co/nusekabe/jbifjfn/7703295645.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/356929d24998b2a.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/36bc01830d8.pdfIn PDF document text
    • https://ramilelajebow.weebly.com/uploads/1/3/4/6/134647205/mudaja.pdfIn PDF document text
    • https://cdn.sqhk.co/ledirevobep/VF4hayw/princess_dress_up_azaleas_dolls.pdfIn PDF document text
    • http://watodakazo.22web.org/speaking_ielts_samples.pdfIn PDF document text
    • http://gusitolife.iblogger.org/sample_six_sigma_dmaic_project_report.pdfIn PDF document text
    • http://vubopukupera.22web.org/biology_class_10_cbse.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/paints_and_varnishes.pdfIn PDF document text
    • https://welaruno.weebly.com/uploads/1/3/5/3/135325412/zuzagol_wefurijaf_fisiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxupupin.epizy.com/11432301293.pdfIn PDF document text
    • http://sukuvafeliji.epizy.com/kutikuxibuduz.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_5fa91585108d429bb39c7e2bec0b750d.pdf?index=trueIn PDF document text
    • http://vuropomap.epizy.com/31787792957.pdfIn PDF document text
    • http://xaxidos.epizy.com/apa_in_text_citation_worksheet.pdfIn PDF document text
    • http://womopemi.epizy.com/cdl_medical_exam_report.pdfIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_974c09f1350f45b9b24d73b1e634022c.pdf?index=trueIn PDF document text
    • http://gadusevi.rf.gd/85919820119.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 5192 bytes
SHA-256: 6549bc84a3e331d4ebd2adf0bca56e5befe97d43ba124cfe3003dbd734888fb9
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 10240 bytes
SHA-256: 454aacc4f2182140a554e04ec008634d39aa2974210376511cbd8b562cdcb4ca

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