Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2b148d663911b2…

MALICIOUS

PDF

82.6 KB Created: 2020-11-11 13:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d3cc8df1ad09c69a0a93bde98a78ed18 SHA-1: 53fc4acb7f514710891c6795e2830ff2cb45ce31 SHA-256: fd2b148d663911b2549a8e2bcba66ba3a6ae185b96c2617342c70e3390ca2e60
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, indicative of a link farm designed to manipulate search engine results or lure unsuspecting users. The presence of a 'download button' heuristic further supports the phishing pretext. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/123?keyword=immortal+juggernaut+guide+6.0 PDF link annotation
    • https://bizowubojixix.weebly.com/uploads/1/3/4/2/134265373/65f852.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/bojopovuwawawa_tixodax_nivusuvawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f895b0326e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f9457502ee47.pdfIn PDF document text
    • https://balomizulo.weebly.com/uploads/1/3/4/7/134708572/2277ca1.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/105f84.pdfIn PDF document text
    • https://lumixiwutetus.weebly.com/uploads/1/3/4/3/134388296/3948847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f950efc7524a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5faa0d7f2f48f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_5f9f2b698f710.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/numegubowalonan/cambridge_beginners_english_test.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/roomba_discovery_manual_4210.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/outlook_express_download_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/kifaju.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/sevodo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/convert_image_to_editable_word_file_online.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_off0001056d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056D 5308 bytes
SHA-256: 44d8b643509f54662c46535dfdd65ee5973892b6fb5ab376fb5ce731f9c118f3
font_01_sfnt_off0001176a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176A 11200 bytes
SHA-256: 59466fa32953b4cb4a62ed1904a801b15c6d5f248cfd644e34a48b6f33508fae

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