Malicious PDF — malware analysis report

Static analysis result for SHA-256 715c732274ebe59f…

MALICIOUS

PDF

81.5 KB Created: 2021-07-27 00:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b32d6d925bf01f500835e8dd3920af6f SHA-1: a986832f8df6bb658edd48c5ce1514b160620c27 SHA-256: 715c732274ebe59f91b77299f865147a0fb5429b8c44d34c083e4a01b7ac2980
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://transmar.biz/ckfinder/userfiles/files/sutivenizawufadagibetudaj.pdf In PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4e4f3e77b---wijakasugigonoke.pdfIn PDF document text
    • https://zlato-eu.sk/upload/files/nekolofebewazeweba.pdfIn PDF document text
    • https://vieclamkinhdoanh247.com/upload/files/wadodoxaziwos.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/rivezusiranexatipegi.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/jakomivagazumos.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/91887794785.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/pemururi.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/93799722897.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7692b263561d2eb92bdc8430915b5121/48410178944.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082120c0f8d9---siwemikepaberadiwikotojus.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cb982d649---semulawipudijuw.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/90851408302.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/23057880816.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0e2087660bcbb985a7ffda83eb82bfcc/manivadozelipuj.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/tamoziduzunamasew.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/ralisogevobix.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-7-3/20210703104351192507.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c02682acf39926f616725a795df5a56b/fukaruxixejorejava.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/fepedegol.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e3d40a402cbddba3728ba0ecdd1abab3/53345983291.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/wifejizab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=evaluating+algebraic+expression+worksheet+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_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 16852 bytes
SHA-256: d29928433f914c79a7d0e27f6f1513dcf818e2577bc78414ebabaab08329a334
font_02_sfnt_off00011d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4A 11468 bytes
SHA-256: 62cf1b8bf0824562aa90485ce40da28d325a453182ccf0d65d3e7ba483ca985e

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