Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c564ae3bba8910…

MALICIOUS

PDF

73.6 KB Created: 2021-09-18 00:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 10a39e7e75a2f9a1cdc69c30024900d8 SHA-1: fa6984f104cbc031742cc46b7742475e0b4fbc6e SHA-256: 44c564ae3bba8910989ed8ace0510f821af4d8550d297162bb8faca6ae768b8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=setting+up+an+iphone+from+android PDF link annotation
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/65258552209.pdfIn PDF document text
    • http://livestocktool.com/d/files/zuwumokefedunalokefepixo.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/ronarupowoluwowojazutoxas.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/65568300368.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/nazawobodujiwunonuto.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/banudiguzosuberowaxobi.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/dekameloj.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/kanemegifawemekizod.pdfIn PDF document text
    • http://noclegsosnowiec.pl/eurostyl/photos/file/tudemakazavi.pdfIn PDF document text
    • http://noclegsosnowiec.pl/eurostyl/photos/file/zolir.pdfIn PDF document text
    • http://imaginove.eu/data/Files/maveletopetawo.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/63664923584.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/pebilevoluzifapapiv.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/dadezitoxurazosubow.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210909085646251744gjbnd.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/meketiruvututamixawoz.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/86366823823.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614029e6e5494---11093759904.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2769414ff67ccacff3cb1faefac2fd73/mixigixen.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/97747963865.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/45855289834.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/7475506080.pdfIn PDF document text
    • http://hanahana.vn/media/ftp/file/toxipezogujez.pdfIn PDF document text
    • https://cargotavio.ru/files/file/gixexolesa.pdfIn PDF document text
    • http://wajl.net/img/file/202198115658.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614049076015d---58997191341.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_off0000bd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD98 10904 bytes
SHA-256: b2ec2054d22e7206d4fb00c621e4a98a668ae438d2fbb1f2aebac64c34bf4a49
font_01_sfnt_off0000d66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66C 16580 bytes
SHA-256: 0c601dbb62b40f63240e35c8bf3eb0d48820f5e65762a0c353255bff2758df7f
font_02_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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