Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfc81295040a456…

MALICIOUS

PDF

103.6 KB Created: 2021-09-08 00:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eb169471e187215d560a5fe2063a00ee SHA-1: eb75f176eca52fcf3eb17e6487ec651defba3690 SHA-256: 7dfc81295040a45664ae45bee3829ebbf6c4fc81eb6a9ba4604a908942ad6c4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/610dd962f7714c6c9066a17101b53bd4/41860404518.pdf In PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/71075285902.pdfIn PDF document text
    • http://sakem.org/userfiles/files/kijunetadosifokeginukafif.pdfIn PDF document text
    • http://slsnn.ru/content/files/fapir.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/xizuvikofilosod.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5be71b61---22566584229.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160adf4490c688---36941102758.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/k9hf2an2qck1dmfsinjgb1ujdt/22079290593.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/vijokokaxexijaba.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/76509465110.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/aed6b9df07f94dcf9096ef34fc2eda4d/61025939487.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b754a1266aa---21090092255.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/gipuvoxotajunofiz.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/duwemegowo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba874023ea9---zapuma.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/70234050986.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/53597238110.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/39212700458.pdfIn PDF document text
    • http://www.terresdescaraibes.fr/file/jawinelareru.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/f3e79275808e1fb814527daa5216129c/38711864959.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/xejukipudonabegozuxorafu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/a57d7cb7966efb5a9518aadd426e5213/18716318523.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/0e24611496a63d0602fefd34c00d6078/movekogatifes.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ab3c0e9a0ff7f4f170fb928d96c5c178/29743610413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=connectors+english+c1+pdfPDF link annotation
    • 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_off00012d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0F 10820 bytes
SHA-256: c5142431eda65599db2cda41fdd87127df871c9c283089fbdfea8e9bfaa118d7
font_01_sfnt_off000145c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C9 19652 bytes
SHA-256: 7ba22a50c6966c1084acf69c320a8b42534f8ba89219b848024a5c2cbb3b5514
font_02_sfnt_off000178d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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