Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2580cb01135157…

MALICIOUS

PDF

83.8 KB Created: 2021-09-03 08:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 683f0c959290e3cb8ea718b931665cc6 SHA-1: 06d65d77694ffbb694b6889a38328fc097857386 SHA-256: 3d2580cb011351574f6999627650ba68f18b8744bfeba0adba1cdd441baa0a65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://philabc.ru/uplcv?utm_term=economic+growth+notes+pdf PDF link annotation
    • https://estoniapools.com/contents//files/93154149854.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/47615342614.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b1396a5b7d2903a71d2328b98c666bed/zulenekutawotajilewazol.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad03a8a4a67---57738578427.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/mugesutewurabajad.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/17950093.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608190f19c788---lipem.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/9823967151.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/42625048463.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/08/file/22976096844.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16090b74420972---99526060653.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/msfs9ukckmaqe9njhiilmrge56/76685626811.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/78438610354.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210721033613_cmp9jo.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/11580002325.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/53512158470.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/videnunadotexij.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8b03c538e---52177265506.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093a3a9a5732---tetepolurije.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611412b1e9750---10729760485.pdfIn PDF document text
    • http://huefpdf.org/upload/file/lorul.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_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 18384 bytes
SHA-256: f1fef0b0449bd218e47624b3427a3bbad0a89ebed51fb391329071b02f01ff40
font_01_sfnt_off00011068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11068 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001287f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 10928 bytes
SHA-256: d0cb091ef5f705b07437afd1e9e33495b73a24be1ba5ec5c08cb7570d9f6955e

Open this report in the interactive analyzer, or submit your own file for analysis.