Malicious PDF — malware analysis report

Static analysis result for SHA-256 f001234ec8fc6209…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 01:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9e4cdba8172426f66ffa09df0c97973 SHA-1: 431b92779ddbd86a536e688985bb641dab6d39e7 SHA-256: f001234ec8fc620987ea7b2f979440080f3274e84ca02dd78d4927fa0091cd76
134 Risk Score

Malware Insights

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

The sample is a PDF document containing embedded JavaScript and a large number of external URIs. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded JavaScript and numerous links suggest the document is designed to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=frozen+1+123movies PDF link annotation
    • https://bientannamhuy.com/wp-content/uploads/files/4560994289.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/sibenijitanul.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/bugopamizitofupawadi.pdfIn PDF document text
    • https://nasikampung.info/contents/files/11464394024.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/pufozuxad.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/sujuwisewoxizetatisow.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/nelefipusaguwikagasux.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0f2aa86e1---totef.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/naxibijakugetolikabute.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/24505727873.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/49988992881.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/tosejakavuvosikuji.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/gepob.pdfIn PDF document text
    • http://pinxedien.net/upload/files/97778725685.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/wafiduvogun.pdfIn PDF document text
    • http://findacommodity.com/upload/file/12221743334.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/zobemanopo.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ac70fc04c70c2b7c4a995cf1f52f8ba4/namowireximosafakiwimofi.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/45100142639.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/fevowuvavoxutosopigelem.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021091417453773499.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/nirirojebu.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/74181984540.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF95 10408 bytes
SHA-256: 491efc7cb92fd704ca2c00193b07978000bf04ff5b111e810a56a23886543173
font_01_sfnt_off0000c73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 15920 bytes
SHA-256: 11f00a2cbb4eaa6d128e6cfe7c9bc4f625c7dc99321281b295c65a1017c60386
font_02_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1