Malicious PDF — malware analysis report

Static analysis result for SHA-256 d254d77809a7dc4e…

MALICIOUS

PDF

78.2 KB Created: 2021-09-15 13:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f6c699e87f6d401551f27dd569067219 SHA-1: c59193514fd9483692be40d573afa39a5554faf7 SHA-256: d254d77809a7dc4ebb6e59c5b7e86a6296325b62f1ad69cea8bad7b8ad8e23aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://smidgel.ru/uplcv?utm_term=gta+5+for+android+no+human+verification PDF link annotation
    • http://pop-around.com/file_media/file_image/file/totekawubuxasalesigo.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/70516473978.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/kizopes.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/fexiw.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/difodi.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/89958357999.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/mebojebizowizimuwalil.pdfIn PDF document text
    • http://ewtch.com/upload/files/zidusujufoz.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/bafelukikidudovekoduja.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/5691119be347520e7267c3bd876f477a/safuvejoruneranojir.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/t19g5s3pip738b6c9fpdrki28e/wutululomerivejebe.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/nefitivevis.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/lopavamerokiga.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/baluferububipo.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/58660789558.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/93969310127.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/nepugosejadifepefilasivut.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a01b57fc67---zolixesabololuzilinejir.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/pikaze.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/82664206319.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/41577338161.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/65784673700.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/21094013427.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/91652976250.pdfIn PDF document text
    • https://slotpt2.com/contents/files/tomufafuv.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_off0000c7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F6 10868 bytes
SHA-256: e5232a7227f92f71af7d0b662fc6aaa1dcf95e16e7546aa3e6d1ff42ba98a417
font_01_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 19168 bytes
SHA-256: 76d9e6a4b2a6a11692ef1464c7e9508cc6373350135fcdf78a0b2c53333f12ef
font_02_sfnt_off0001134e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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