Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e13e3d5211791c…

MALICIOUS

PDF

86.6 KB Created: 2021-09-14 14:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9bcb039f7463be9032396b8c22e91c26 SHA-1: 9d3a82b9f8df910fb95431e4ed0ce8b1d961029f SHA-256: 75e13e3d5211791cee118bdcaa98298cfbd1f912d6136a65713384b1f9fe90a6
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics suggest it functions as a link farm and employs lures like visual download buttons and QR codes to trick users into visiting malicious URLs. The presence of numerous external URIs, including one with a 'utm_term' parameter often used for tracking, points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=jinde+meriye+full+movie+watch+online+free+filmywap PDF link annotation
    • https://marblobath.com/app/webroot/img/files/balifogupoperifukunugulu.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/36275896189.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/besalip.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/tajotipizonebafu.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/runewiwobavexax.pdfIn PDF document text
    • https://qnzar.com/files/selitanapodo.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/84239132806.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210911120208148501u8c3mpugy7wi.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/vazunifurez.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/gafix.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/petuvezirarubijep.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/175a9eb5c6181871467647056ec26f8f/28863185720.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/jozotogogamozubanomivegiv.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/xunirufupezi.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/lopoduwetugawulotolaro.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/paponifobikawibojojo.pdfIn PDF document text
    • http://hla.vn/upload/files/37378197804.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/25648685656.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/zejoru.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/pewemedareguvuzusevof.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/93172733025.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/diwosoravopi.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/sufogatodawuda.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/037aa0f683fe60587c1464ccfe9c26b0/nepibaw.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161357ef729852---74752016102.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/zujetuselakikoxepuxope.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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 18240 bytes
SHA-256: 25e98c0fdffc2a8d282fee705a90fdd9d713fb687703a7ad972c6c763d42df35
font_01_sfnt_off00011a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13269 11072 bytes
SHA-256: e1c75455f8ca6d3096e2fea2eb96ad0af3e6424db802e47324101c44a513d7b1

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