Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeda2cdccc33f64…

MALICIOUS

PDF

85.8 KB Created: 2021-09-01 08:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 11ebb8f3737cfd99c64dad1fb501fddd SHA-1: 402c1705af8ee82c8948a5bee7d686221de1553a SHA-256: 6eeda2cdccc33f646df2f39defa71268c38ae6831dad40555dc02864b7c64715
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=how+to+get+pregnant+with+2nd+baby PDF link annotation
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/6e7cfa970b17c26d5b2a93006138ef46/54040614716.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/tatopeve.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/6db6b81245896d92b78be7a057e244d0/17235552397.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/wiseganafukadokaxumal.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/rolin.pdfIn PDF document text
    • http://quaint-house.com/lutijenepumasivejunawob.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/62213460515.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210818125215157.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/24545196245.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/sirj98pee8d1se72k02kmtk23k/6830552717.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9fe9dc52f---87677087507.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/43311047273.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/83161340472.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d20318144b---76793401921.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/vavapepigobilapus.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/23019571114.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/28110335079.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/73963697643.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/forolamamanipokawisuvif.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/jiginel.pdfIn PDF document text
    • https://datawire.gr/files/files/ronudadu.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/10029968684.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/95f3c673d401b4b75c907155ab5bf615/baputoderero.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_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 17260 bytes
SHA-256: 29dba5805f28c267718cb61f51bb02f3909c1ad130f0ea5ec90fbfe1fe78ed38
font_02_sfnt_off00012d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8C 10908 bytes
SHA-256: 3fe7033a71d380a72c10418969398c13955edca39028697bfaad48fd66e94322

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