Malicious PDF — malware analysis report

Static analysis result for SHA-256 d768f9562330b41f…

MALICIOUS

PDF

86.0 KB Created: 2021-07-15 21:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 96f1d21fd8ddf7a30d0431a79ec526a1 SHA-1: 0011632cdc70d023b3601eb7316b78f510b181c6 SHA-256: d768f9562330b41f74e09f43e335e46e4a2e3bb90a5d90019ae027d114f82607
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The heuristics reveal a link farm strategy, with many embedded URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms strongly indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6368

Heuristics 5

  • 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
  • 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://coretry.ru/uplcv?utm_term=3+day+notice+to+cure PDF link annotation
    • http://nuraski.pl/wsg/userfiles/7374422925.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/rimonelolasunuzojebovadeg.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/10346877153.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c2539a960---toditonisobobamaponoduje.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5346bd47c312cbf16a7cd103d4e38c42/35911788893.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d5df878bc5b8b51bb60b13cc2ac6112e/92881146563.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f552f81181---dixabefabesulo.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/pga79se2t6jkahrt77aso0sfcv/77991317427.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/mexoketiridoput.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607febd3e482a---43248441107.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/23017178962.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98d6601012---meparumorufiru.pdfIn PDF document text
    • https://curvy.tw/upload/files/82226040266.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971131529f2---luxawebakegotuxilo.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5upluik9bgeuv14g9aghdunqne/xexawejamopozodokufiposu.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c99300e134b---pewupurogufikogonojanaku.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/49687257126.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/zazomenej.pdfIn PDF document text
    • https://reniuved.it/file/8005045706.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bedf123e0---jezaromurajaf.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/wufovikexalurujulajakokig.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607164eec6042---lizivulexonug.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/61520048604.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/f38e798174a98de477e25be390319ff4/zitozazarusazifusewi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 17544 bytes
SHA-256: a1297cafc0203c37743a3663a8e58f7adfe218a8e0df5abd2a99bf1ce5f814f9