Malicious PDF — malware analysis report

Static analysis result for SHA-256 af020594a2dee33e…

MALICIOUS

PDF

83.1 KB Created: 2021-08-11 19:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e259397036f900c5c1d44936b458ff2d SHA-1: 3b6ff7c866c3de56bf736ffda54f871333c54cf9 SHA-256: af020594a2dee33eb9fd21b7b734f157d749a1c0e68cbc87af2714f8b3256506
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous URLs, many of which are part of link farms hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9394

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://oniceh.ru/uplcv?utm_term=sony+vegas+pro+15+crack+patch PDF link annotation
    • https://xn--80aaijzh9b.xn--90ae/documents/file/jonapiwojubugi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac9735437---7706139509.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/24363894223.pdfIn PDF document text
    • http://bociany.sk/media/file/78659687696.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fffa2ba11---16853159670.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6340206307---gufezesutisitet.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210703160308.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021080501343697794.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/webuwitarenajaxuliponufo.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/wadotuv.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/zeranufusiwigoxelum.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9e6dd06c6898f2226457b433bd290500/fefutivukixog.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7g7t97oni4tdlhdoa1huff2l10/buzopuwapuwem.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/r8f2sm8ramfeidrn54ob26kl9r/lofitemopiki.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/xuxomilefujaluner.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608270565323b---rutiwetuj.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/2d8daa083fa969914273b0632301480d/muwuke.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/34381891245.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/zufabazigubapuzizano.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/71356900028.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/s4p701s5jsfs73veee9dvgiea5/bapujabab.pdfIn PDF document text
    • http://fittbike.hu/files/file/31358812478.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/69665240885.pdfIn 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_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 17620 bytes
SHA-256: f63d15bd288e50c014ade9cdb88f004829d6fc7717c4f7714a84a457c85dc005
font_02_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 11048 bytes
SHA-256: 9297241ccfbac693f81189bd3f2c38c7bf3818b95e315a8299f8bd6b8313bedb