Malicious PDF — malware analysis report

Static analysis result for SHA-256 805502522b01ae07…

MALICIOUS

PDF

80.8 KB Created: 2021-09-20 22:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9679dcb4e08d939ac9cdf00286aacb27 SHA-1: b447324b193016492d0f64dd4a1e99ae9fca4749 SHA-256: 805502522b01ae07762696f90cfbd0c37c279ec585ab7286a48a5398c9878008
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous external URLs, many hosted on compromised CMS upload storage or disposable domains. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://catamma.ru/uplcv?utm_term=free+fire+mod+menu+ios PDF link annotation
    • http://anduong-nhatthanh.com/uploads/news_file/rezetobamaridopazopaja.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/wujosojesepikiduxos.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0bdad93c1---40906613048.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/7282634920.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6c49abdd9330ec203f7aff0128161f23/50169333593.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/49127046302.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/mutegenipopetadegake.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/93663998499.pdfIn PDF document text
    • http://qishuochem.com/siicea/userfiles/file/nolub.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442cd5bf256---59017244638.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/venegaroga.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1d4a6a3892a0d23dbecaee5245320998/xogexeviwesimomusovul.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/wulon.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/74302635902.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141127c91c25---79806783821.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/63078583857.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/kitemizogimosad.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142239133d71---31752576900.pdfIn PDF document text
    • https://iohrp.org/f_files/files/88093422552.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/taroredixijijuzewetesipev.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/13263847916.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/dowivemaromuvivupobonepiw.pdfIn PDF document text
    • http://dentali.cz/files/files/jizix.pdfIn PDF document text
    • http://elitvorota.ru/f/file/34851004519.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_off0000d74f.bin
3589f1158eec3dc0f8afa7230755dd7d2734e75ce031ffe6ff7a1511b9686a2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD74F 18044 bytes
font_01_sfnt_off00010694.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 16792 bytes
font_02_sfnt_off00011eab.bin
534f827a03947f05951a228b71211f72c02e1f78c6aa18c2dd4b0a304b00fb25
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAB 10284 bytes