Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af2628a430ac0dc…

MALICIOUS

PDF

85.4 KB Created: 2021-09-09 02:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 25ffbc76f8666b6938d989804da17c67 SHA-1: 69c548ce3e213952b9fa3f5fb870e54e45fd9194 SHA-256: 6af2628a430ac0dc3815b6fdf7c0bbf93474d21a3ade29681f89cbe8e9b9fb33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Static analysis revealed numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially harmful content. The presence of UTM parameters in some URLs further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://crewmak.ru/uplcv?utm_term=talkatone+new+version+apk PDF link annotation
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137af0c7bc49---dofuxuzoru.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202196614501302.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/75749310207.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/favetoregozawizalodu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133400a54dce---fuzafuliz.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/zadeburafujapevuso.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/diforekaxabifug.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631102163.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109071124349466.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/89299268704.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161316a117b43a---wuwit.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffa52596a8---sotuvetovifula.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/sodozomi.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/49115060673.pdfIn PDF document text
    • http://lizhechem.com/upload/files/rugemazoxiduzisurip.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/bipebokumunabo.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/xipumoliwebolise.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8056810998a8b698a2edff6ef914a7b2/vebile.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/nadelazozamabopesuv.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/24987231386.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/lodefivenuwupumufoligixez.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/wepixa.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/74857449795.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/wegazefaxatababutobite.pdfIn PDF document text
    • https://mmtours.si/uploads/9141666077.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10452 bytes
SHA-256: e9d5c798325b6a696aa73a36e03d2333e705e6b8db1ae7f9bf5b7974a9386e0e
font_02_sfnt_off00011672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11672 18732 bytes
SHA-256: 3f4679e8f2ac1ff1b581c84bc021617214cdc9e626ef79205d6cddefc834b63f

Open this report in the interactive analyzer, or submit your own file for analysis.