Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fb873a16952a50…

MALICIOUS

PDF

80.8 KB Created: 2021-09-05 08:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 58c2dc951e530bdbbc6223e7bd99c72c SHA-1: 3423fe23aa329136f25d914e43c1cfb51be10fd4 SHA-256: f2fb873a16952a5093567c6c1252eb41e201888779326c143cec0b9688045e79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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 http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/39403468641.pdf In PDF document text
    • http://ranjitabiswas.com/userfiles/files/6409235958.pdfIn PDF document text
    • https://ovalpolycoats.com/media/rakabizabukemojilonopo.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9eadc7c03---doxed.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16093e15a0966f---62698719494.pdfIn PDF document text
    • http://boki.hu/editor_up/fejef.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/wutukokuzewekofofopikari.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/tesabofiguk.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608183f7b0a64---58628736961.pdfIn PDF document text
    • http://citra.cl/userfiles/file/pazaligujinoxoxejofujo.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/nalugowig.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/21334661789.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/51691616797.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/paromivigozupobunek.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607695a90a110---71343149691.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/46640831378.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/41928240839.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/74209486228.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607694e8100ea---28807958458.pdfIn PDF document text
    • http://cycling-software.com/files/file/93073996735.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134173853285---tokelun.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/25411879333.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/81175479649.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/74133055345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=50+activities+for+developing+critical+thinking+skills+pdfPDF link annotation
    • 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_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 11216 bytes
SHA-256: c2b53d2b748af01774e7c2c4bf41723610ebecefe8ee5bb748bef63c8661ac06
font_01_sfnt_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 18320 bytes
SHA-256: d05d1a47eb14b54e1f9e2e164b568c9f877389235ea6eb482e8eee2f052fdac4
font_02_sfnt_off00011cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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