Malicious PDF — malware analysis report

Static analysis result for SHA-256 46045144fad119ed…

MALICIOUS

PDF

64.0 KB Created: 2021-09-14 12:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 4307c73b861d752c831a82a943b14cdb SHA-1: 94aa4e4186e40caed5fd8a3ed3df34b3768f05c7 SHA-256: 46045144fad119ed7f8e586fcf48e8632e1edf03175b64354765f44db5292653
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs confirm a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9481

Heuristics 5

  • 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
  • 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://2990592.ru/ckfinder/userfiles/files/23213716530.pdf In PDF document text
    • http://mai-colle.jp/userfiles/file/goxozedi.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/1722199225.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/91687794902.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/35361194234.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/8559709925.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9b2ed93ea89e2f671834e8ec06ed9cbe/bikematakajatixorimidagin.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3147873399.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/85798562522.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109041055418260.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/60840471707.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/58413156835.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/sazimefevezaxerena.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612eef3306e45---33239164407.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/penasesanozeseb.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/93880289293.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/72867419510.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/vuwomivilejikojigiribij.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/1a49d274dbd91f30d8eba2de7b11daf6/97691099057.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/99123553213.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/zutelolixixuxoj.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f4ae80f35---43005369784.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/62057758281.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/15105662591.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b272bc035---15085030930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=android+launch+app+from+urlPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 10568 bytes
SHA-256: be49e4909d27463f4be2aec8c5550937d17eb998902c22acad25071f68dd1734

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