Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cda7a20c25a2cf…

MALICIOUS

PDF

82.2 KB Created: 2021-06-10 08:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4692e1d452ca6c87c97ef4dcdb8e5b09 SHA-1: 3eb1868f97db8c94c90b54fa5b0b202122d2463e SHA-256: 17cda7a20c25a2cf4b06ef37868e61be631bbec5a1795b6df2f8b4d79917b36d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users away from the document, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=home+alone+4+torrent PDF link annotation
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/nuc8hertl8q0h34ob6d55fos7c/31760256905.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a68ad2453b---98121290379.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/38b586cd0ad1e77c0cb5777ed2290ac6/nezoribeba.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ig3u5lsj4t9to67mlav2sjfkib/25992178915.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f3be1e505aede78a87ee7c31f0020972/zifabamilusaju.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2ae7ee57a9ad85acc5f3dce4f831b251/kodubawisibusug.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/29b1ce2e204515f432457da81fd80e2f/dibuk.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba78b6156c---91668673550.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/fc642eb9111cfe06a3bad3c75389197a/bujabagidaganemifi.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/3c8ra2gf8kscukf22hc1jgt5lq/malaposubul.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/wuxubilogakujoji.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a94f4ac2703dd77eb1c573914a471acf/gaterekikegumebivinenalum.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd4087d6dd---gabolodezebenifofa.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/93661028672.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607302c1dc56a---55116523886.pdfIn PDF document text
    • http://digifast.cz/userfiles/punusavanevilibeki.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/5267b9b43da2fecf373a1f7c41c4a4c6/gunava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 4700 bytes
SHA-256: ce1bc8ce72ad9751e8c7eff1c1f968dfa4c0a63ce66e640bbe0ac9584600a388
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 10380 bytes
SHA-256: 7a601a7d72044a9c6e732dbcc60dc9e97bd96ef4da64fe1dac8b42f81e542135
font_02_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 16060 bytes
SHA-256: 660d05b38fea380e8cc13f4a5a7db764e9bd2a20a73145a73af50c118749f22b

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