Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe5aaa512e9b7c3…

MALICIOUS

PDF

85.2 KB Created: 2021-09-19 04:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 46344294875521acec1e693584442753 SHA-1: 916414ed72d42e1a80bc9b106b7fc04faac86630 SHA-256: abe5aaa512e9b7c3c310758496bdfa56a52468b2ac705aa59df8d9821dc4f58b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, for being malicious and a phishing/trojan. The presence of embedded JavaScript and numerous external URIs suggests an attempt to download further malicious content or redirect the user to a phishing site. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing or tech-support scam pattern, where the user is prompted to call a number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+to+turn+my+tablet+into+a+phone PDF link annotation
    • https://ptkas.com/kingkong/userfiles/files/fadujinosuwavibineruxuwa.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/69277789827.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/95160877712.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/528053a86171418dda726d876b663904/19288270456.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/zapebikevaxeka.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/45278451266.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/58478090589.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/bojovetuz.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1631528933.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c51ac008d---54544020149.pdfIn PDF document text
    • https://ms01bet.com/contents/files/11209720798.pdfIn PDF document text
    • http://duef.ru/public/file/2010781383.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/bugigaverivizekis.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/kokolakumufedepegitaputoj.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/44014787847.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/82545563816.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/depewedemod.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/venaputomemujiv.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/91881904854.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/08/file/20210908_182513_140.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/72239982346.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/38749951250.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/23525009333.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_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 10780 bytes
SHA-256: 023e9c36741f57728de2382c8ac7adae7d247a04ceb7bb7afa750e9becd1bd53
font_01_sfnt_off000101a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 17600 bytes
SHA-256: 0031b8c2b3ed4e4dabe9c0509e2d41f7de462df9e068350540f76e21d4cc2296