Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf20a60f99a4ffd…

MALICIOUS

PDF

74.3 KB Created: 2021-03-09 10:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 94aa5158556ec7ae4a5576b083cc5489 SHA-1: 99c1976afe25b50b341516fc7df4f65eb06b90ac SHA-256: fdf20a60f99a4ffd67889a7d3a89946b62108fabc57d55b4907869c09db1b867
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 0.9993

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://vilenefex.ru/award?keyword=atomic+structure+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5fff689f5242c.pdfIn PDF document text
    • http://towufugejudet.iblogger.org/ftl_ship_achievement_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_6012fcd9255d7.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/58343586897.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/wefakaxorebakageg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_60198313e8c9d.pdfIn PDF document text
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/727e934e46.pdfIn PDF document text
    • https://gigemapafinul.weebly.com/uploads/1/3/1/3/131398374/7cb429204d25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_600596dc608e3.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/apache_nifi_for_dummies_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_60316613d20bb.pdfIn PDF document text
    • http://zurivupubidej.iblogger.org/whiteboard_animation_app_for_ipad_pro.pdfIn PDF document text
    • http://wewedaz.iblogger.org/freeze_my_credit_report_transunion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fc8d92965a70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495994/normal_600ea56dcc47a.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/4208015.pdfIn PDF document text
    • http://vudasuti.mygamesonline.org/how_to_clean_keurig_2.0_internal_tank.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505837/normal_5fe4ee6d6114a.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/33745910100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_a4e97b068c8d479d8c9b38a2e0661227.pdf?index=trueIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_683270e418484ad4ac242563b826bfb0.pdf?index=trueIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/27306337785.pdfIn PDF document text
    • http://xesovukefezusag.rf.gd/monthly_behavior_chart.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_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 5384 bytes
SHA-256: c7cc86c0a70c846c0103f620f6fb74cb8943c7ffc02979a3d922605ee2596b2e
font_01_sfnt_off0000f820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF820 10532 bytes
SHA-256: fe4d65bc0104ff634fbd9cad91890f01065537fdd0c3d1d36fcda6900d24c6ec

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