Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebb24dc192d8f82…

MALICIOUS

PDF

69.8 KB Created: 2021-02-23 10:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a18b8165b29a3b18203e377c4def034b SHA-1: 49ee4e233445745a27df6d1d8edf1b9e9d7346e6 SHA-256: 8ebb24dc192d8f82f1044a84151b34f2c9d82aa208740a73da70a0b71296aee4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/aws?utm_term=dewalt+20+volt+brushless+drill+driver+combo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444369/normal_601d0510c1c52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5ff188a8e3710.pdfIn PDF document text
    • http://zootime.store/free_puzzle_templatezle16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487665/normal_602de4aebaffc.pdfIn PDF document text
    • https://fitikuwez.weebly.com/uploads/1/3/2/6/132681307/burabezu_dokititoro_povibegunibizo.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/luziwulejesukob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5feb35d2ebb39.pdfIn PDF document text
    • http://leree6.club/kevezomexetosogaf5m3o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_60318eacb2c0a.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/mofefo-bugakajejulalix-momadisoxefer.pdfIn PDF document text
    • http://return-0.com/controllable_canonical_form_in_matlablolmc.pdfIn PDF document text
    • http://reduslim-shopofficial.site/miraculous_frases_de_transformaoai2aw.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/xokasoxaxola.pdfIn PDF document text
    • http://iminn.ru/watch_up_software_freeeoicn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://komivarutu.epizy.com/budhdev_aur_badrinath_game.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/21281258210.pdfIn PDF document text
    • http://kafopazam.epizy.com/magoxevetazujekibemagoje.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/browser_ling_whatsapp_jio_phone0.pdfIn PDF document text
    • http://nederanunotaz.rf.gd/61215659286.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/lijonogakizipuxikegusule.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_off0000d245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 5744 bytes
SHA-256: 47401a91ce03bb69b3b12b2d333dde9b305be7693b947cbadc434ce46e1aed3f
font_01_sfnt_off0000e5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 10576 bytes
SHA-256: 4bace0e48f79ad60ca1eaf2e3cc9689fa9a8b12bfd2e5bd89501d33e0bcae4d7

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