Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c2c547c398d012…

MALICIOUS

PDF

79.7 KB Created: 2021-09-05 12:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8285437a9b536af5aaec067e7702ae2d SHA-1: 20274d31fb208d8614fd587ded08b0f818826690 SHA-256: 48c2c547c398d012be279cd485e9e99398b6eb66421ad5c089a5fd2172b15695
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7972

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
  • 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 http://nessium.net/userfiles/file/kitunulafexu.pdf In PDF document text
    • https://dadesigning.com/daduserfiles/files/tojidotemuluzu.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c493fbcd7e7---92428522527.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-08-11/bf6ec99e9607eb7c5cf98f8b5bb6834b.pdfIn PDF document text
    • http://qzgj.cn/upload/file/sakafalub.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994a22c3cf6---muzevo.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/7n347hi5th9q1l32lrniom7va5/99882891352.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/mubodubexedir.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/773a030dbf111806f22dff993d1acf95/xolataku.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/cd625fbc6fa37163896377399d66fb65/76090625225.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/79f517257b9f636abd6aa6f2dd43cd4a/senikatezekifofifez.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/zenesodina.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/14490417048.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bbcf8191d---93749623907.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b47404888---27233559349.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/natugukeviwokodi.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/90705046784.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7dea1059a---zevivapojolamo.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/60634449578.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/tevvnmfssj2auf58veik8omv80/tenonuwepinagajepuw.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/14537927053.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9306f7a3d7---jiwiwuwatavufajoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+compress+pdf+in+macbookPDF link annotation
    • 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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 17424 bytes
SHA-256: d54f7d7047478c5dbc4843d754b2c345f6f883ac67b4e7568405d708fc4a37c1
font_02_sfnt_off0001244b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244B 11044 bytes
SHA-256: bb0498cd3b1d8409560090eb92d759152510a344d06b2e2542fa369e822cfffb