Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fa0d262f0275de…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 02:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed3a1cfbe87d5124500eadd0f291445c SHA-1: d6afd1451ab38cdb4d71933ba723a7252c4e3ef7 SHA-256: 03fa0d262f0275de6dd7c1298284d47ae3dcbb18b28f952793a13bf89dac732b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external resources hosted on compromised WordPress sites and other disposable domains, suggesting it functions as a downloader or redirector. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign aimed at driving traffic to these malicious hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://oniceh.ru/uplcv?utm_term=bvg+u+bahn+plan+pdf PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161131650cf7f8---gazegulimidikoka.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/73521836811.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pscom5l85usadf6iml7o0sgfr0/19394541057.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/pinag.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/4055895006.pdfIn PDF document text
    • http://iphysiology.ru/upload/mojusef.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/bedosanumaxigani.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7eb9dedae---93362033592.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbd9400b66---71482723042.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/vofixarilufuzaguvekojum.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/ba98bf661c48d3d9d292e1109e0cbd3f/mojusopimit.pdfIn PDF document text
    • http://mousike.it/img_ins/files/muvobuvepetoxowuzep.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/93120c19c7597288b7a87acc12c26385/jemadepotus.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/62518720293.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f8c537b0d2ce72aaf0ab61a87cfca726/lusozawavupaletinopuxog.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/fifikubotujuruxuviwo.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/48606967455.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/12985259155.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1627767345.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/51063828786.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8d11b50b3---japimitepe.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/81041548978.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/u47o313uftnh0pdcj1kc9oo273/57925434780.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112d381dbdba---53280309418.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/80454736508.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_off0000d9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 20208 bytes
SHA-256: fd0ad3c7b690bdb0805076e9fc8f5c9c2f42ae4f255b83123297f894c1bbcddc
font_02_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 10428 bytes
SHA-256: 7014c54bf39dc1c1283c63bf0278cce7eca902a7da8c698a925ac56f1a866903

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