Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4012e9f7422517…

MALICIOUS

PDF

78.7 KB Created: 2021-08-14 19:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dbf1b401ceb0e261158b6175b5103052 SHA-1: de3a1dd547e1bbc2d19dea6bfaba769277277f60 SHA-256: 4d4012e9f74225177a94204a11e38cd33dcb9c1b504529133e3854a120b8ec33
124 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting. This behavior is indicative of a link farm used to distribute phishing content or malware. The ClamAV detection further supports its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4357

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://queure.ru/uplcv?utm_term=is+altice+optimum+good PDF link annotation
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6a204b155---foniginomu.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/nenogadojoj.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/talolegufus.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/eifd35rk3jr177eu6tqm856vjh/rexaxeselopibirezepabixe.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/27113876065.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/72054758756.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e64892fb7dc34819daecdf976b7bc4ff/44113506327.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/75264686391.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210803_47C901A751007898.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608823905edf3---zodiwuxedo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/4004c22b004cd93abec28dd39d300343/rofeniwomunapewux.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/34405342934.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7cc49da35e3069ca69098692afdab3fa/fikagidelebejuvazijiwalum.pdfIn PDF document text
    • http://epicridesnepal.com/files/94547561831.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/c33255c747bcf51a1ca5ac91d2a6ec8a/tenirububebimefokavuzunaw.pdfIn PDF document text
    • http://cy2hand.com/userfiles/bozelenojadabe.pdfIn PDF document text
    • http://ezibra.pl/upload//file/sabosan.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46937826a8---vaxegokedugedo.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/39dea2ca8f28a0d12d735be75e42fea8/gegepowadimagezajo.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/66613736365.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/zukaketixuxakepin.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/41214290495.pdfIn PDF document text
    • https://biocoils.com/img/file/piteg.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35bb86eea---81113318795.pdfIn PDF document text
    • https://fultoys.com/userfiles/65416407101.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/nakipidebokuli.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/rmatdvauhqphg01570j15sdcj3/molawomo.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_off00011229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11229 10704 bytes
SHA-256: 975c6fe0fbc399fa6f68880b9a74c218b2a1202a154aa6b44086df43476261c0