Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab8f02c2a00690d…

MALICIOUS

PDF

67.9 KB Created: 2021-09-01 11:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cdc4b96a429fa5ae58317c118138eb17 SHA-1: cb915feb2e3e5dcf74a136590a9ba7efe8fe7226 SHA-256: aab8f02c2a00690dcfaf411982f2e9539d94ce22ff3548a31395a08806999d37
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. The document contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites. These links are designed to redirect users to malicious content, potentially exploiting vulnerabilities or leading to credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7971

Heuristics 5

  • 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
  • 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.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad9f392fc794bc7cb19b73be51563c31/26382994559.pdf In PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609592aef393d---26663386968.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094562b8db9b---rejubepukonugo.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/534fvov3m22esc1simol1rcla0/13342041818.pdfIn PDF document text
    • http://torgoborud.org/images/file/tijosutubi.pdfIn PDF document text
    • http://goref.ru/files/file/8107873552.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a2ac371772e16f79fcee2c840acce6ed/vusapatox.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/bolaxeb.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160705ef13269c---getoguwaxix.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/kopivulalirivexafiramep.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9ul3le728fc0m9noo6vq3off3p/zekafetopudowojadarem.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/3125403750.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16087389f76809---73203942430.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607555ed515cd---xotamopitobidel.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/kuxedatisefaratoronakobu.pdfIn PDF document text
    • http://myslizdrave.com/soubory/51624089399.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc6311004f---99903116570.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/rirusura.pdfIn PDF document text
    • https://coil.hk/upload/files/bujofaditalarifemile.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/vaputurivanef.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/kedubesadiripekitezezug.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896ca005d9b---87334378198.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/d1f4868132ce922fe819cadbc1cdace4/xidixasezawadusofep.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/53187190345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=find+equation+using+two+points+calculatorPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC284 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9B 10996 bytes
SHA-256: 148a9da4479dedf2b9c82529b7a869e71ca53706703e2ae8f0b8664e323deac1