Malicious PDF — malware analysis report

Static analysis result for SHA-256 74123adb1d4875be…

MALICIOUS

PDF

65.9 KB Created: 2021-08-20 13:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92d42b1422f2ff168f032dbbd9eaf7ea SHA-1: d64751b0aed81f41ea453491ff3c59295993a005 SHA-256: 74123adb1d4875beabaec8d22f4ad378682a079c7e9888ec0b6264c36c7836ed
162 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites and disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to distribute malware or facilitate phishing. The embedded JavaScript, while not directly analyzed for specific actions, is a common vector for exploiting PDF vulnerabilities or initiating malicious downloads, contributing to the overall malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5479

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://gyobel.itpublic/file/vipafeposelip.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611c7a52b4879---faneniz.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877df392b29---pefuxeborad.pdfIn PDF document text
    • https://peterdegendt.be/file/kezorodezativixuxinid.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd960e7a567---zedirenexutegipavosiluv.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4a5aafb4---verumol.pdfIn PDF document text
    • https://heyratacademy.ir/file/55678679050.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e6a580829fc10f7feb595b8d8943de94/wonidabasipibawawapexefal.pdfIn PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/dimeguxonupubik.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/zarukolebof.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bef726e8e21---tikuwodefarimewuwaxekup.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/kenazorebogedifoparesul.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/wefajotizuk.pdfIn PDF document text
    • http://novichiha.ru/pic/file/69696744875.pdfIn PDF document text
    • https://luminex.pl/upload/file/ligemawuvijigar.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/82952877925.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/jafarowunokixozubu.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/91920305457.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2eb780262---93809943286.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/60654421575.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4d3c75d5118c5f9e2f8c980adae8122b/garadoguzuletevujetir.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/5381963625.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbef3f9e9---vonefibavojeni.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f390485d4---pitowakafugugoz.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/66830895407.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b0471ef89---kupomit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=avast+driver+updater+registration+key+crackPDF link annotation
    • 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_off0000e762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1