Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11463347a731f43…

MALICIOUS

PDF

72.7 KB Created: 2021-09-19 23:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4798d999f3583e4973fefb8ec4a3f799 SHA-1: 8c91b67ba3f271f3c0cfeb32d6fcb7e7c0030b5c SHA-256: c11463347a731f43ad92411a626ef914f04ddf8f1a2b01164eee391c4643dbe0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=paw+patrol+the+movie+2021 PDF link annotation
    • https://www.nevjegykiraly.hu/userfiles/files/28717003203.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/70f1e11a18c401e60bbd033222f90313/giwoxikixusefixabinanifi.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/84821930245.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/bumixam.pdfIn PDF document text
    • https://kiptep.ru/file/89508260960.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/kimemanegapuziku.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/78253610062.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/85613572996.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/muleleforipuvenuto.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/nididajuwepijugu.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/vuvizenoximorajasupamavuz.pdfIn PDF document text
    • http://inphilong.com/upload/files/64467505987.pdfIn PDF document text
    • https://autoskola-scp.com/files/68364939527.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/91548524070.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/73665751839.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/7248829304.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/powiwav.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/60235597199.pdfIn PDF document text
    • https://ccskin.com/geektic/files/98756476350.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/wosukuvaxizener.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/37873468344.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/kajad.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA75 10692 bytes
SHA-256: c82f87958ac5fca4829e5637d381a44a94f445a7e5f310ea88e5cf56bc55ac87
font_01_sfnt_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 16484 bytes
SHA-256: e2598fccd32956916a7a31474e81d0c8e614b3a0eed8736a407ef62b4ee5db3f
font_02_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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