Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe489f4ec37c34b0…

MALICIOUS

PDF

76.1 KB Created: 2021-03-19 10:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 12d71acca6ba6da75704fe57e746b28b SHA-1: 7aa51644abe88b445ca63e939b728ce9b6d5e829 SHA-256: fe489f4ec37c34b074ed088b4fea8bd6eb74a744ced7f16285ae7f095f5856d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or SEO spamming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jottigo.ru/award?keyword=arrhythmia+types+pdf PDF link annotation
    • http://elinekici.online/privilege_level_user_account0firg.pdfIn PDF document text
    • http://everydays.space/mipubosuwugedevuxasux8myi7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_6000498ddfead.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/62336727513.pdfIn PDF document text
    • http://fresh-ita.fun/tapotumifekawidilapuzalzr.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/chemical_oceanography_textbook.pdfIn PDF document text
    • http://goodsfor.life/belly_up_meaning_in_tagalog4kw78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fff4295c5dee.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/68884944072.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/witupilojegapadupuvel.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/bisiku/89507459314.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/university_alabama_football_injury_report.pdfIn PDF document text
    • https://a35b4eae-300a-44a5-b982-8d633984e519.filesusr.com/ugd/19735e_0ca271918fd8459bb7e31457ca990d3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinezedu/67591299570.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/android_file_transfer_not_opening_mac.pdfIn PDF document text
    • https://105d84dd-9b22-4355-af37-21382b2db671.filesusr.com/ugd/f4243a_8030952e494c4fddbbdeed7686541c19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/90460740043.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/10323658755.pdfIn PDF document text
    • https://2e9d2e4a-15d5-4529-8b29-235aceea4e08.filesusr.com/ugd/cac96f_7566b4b3b07242b79e27d01c757ac098.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/dinamani_today_news_paper_free.pdfIn PDF document text
    • https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_8c9999aac8464d33901ef82f4b92eb52.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_7ebf5b51f10d459fb8cab546a73baf54.pdf?index=trueIn 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_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 5340 bytes
SHA-256: 1b55b24ca4252ac635658fd3b25207f4779b1c5e3205b6fe39dc02d18aeeb3e5
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 10412 bytes
SHA-256: 92cb907e58dc8e1cb8b58ca955a29c0a96227db7f49dc70f989fea65b62365f5

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