Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a215aa9ef76d0ff…

MALICIOUS

PDF

79.1 KB Created: 2021-09-18 05:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dcdad6051571282a632284d38a9899ef SHA-1: f07a330d6a5ad8825db7f577d69f4d06c7b8bf02 SHA-256: 4a215aa9ef76d0ffa7f3085e6bdf241757eb0cd6361d5feef043bfbcf45e66a5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of a QR code lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=wifi+qr+code+shower+apk PDF link annotation
    • http://uniquecharacters.com/upload/files/60567534147.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/97510619399.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/19760431987.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53662953002.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/mutotowisijatesoz.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091401251448738.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/tenemuxujorobelegikitis.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/55025782908.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/gokolamodobidal.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/51514561571.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/98833584223.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/dasuzibukuzejibabof.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/63ea2240352bc0adf39c733f342698e6/mobutigikopojaferamafesu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae7764844f---90534600144.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/29086976479.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/77891624172.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/27075329602.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/safiseweneteletapano.pdfIn PDF document text
    • http://ume.civilkozpont.hu/uploads/file/gonijisedudozobug.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///202109167916_319846395.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_off0000d0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 17840 bytes
SHA-256: 1d9206395b8686dcf112154a930695184ddd6dc83dc8592afd477725f614a1ba
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11767 10784 bytes
SHA-256: 24eb3552aa2b88a8544126b97899388e85d29239f71bce82041ff7a0eb3fb29e

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