Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d488a72ed0683e…

MALICIOUS

PDF

74.5 KB Created: 2021-09-15 23:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f39ab290484b4e83a9c94781e37fde08 SHA-1: df15752442c552e1a2ba487b92717de87f14d7b4 SHA-256: 61d488a72ed0683e58fe41cc270f6b750163a2edc6cee7467b309267f9552de0
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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
  • 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://pixomot.ru/uplcv?utm_term=best+youtube+videos+download+app+for+android PDF link annotation
    • http://sushi-belovo.ru/files/36448645460.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/wojazise.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/wadekubakutanirizavil.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/tibapovuxabitesabugafina.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/gabiwisamivi.pdfIn PDF document text
    • https://tckontrola.hr/files/givodanulif.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/dupak.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631420451.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/kajogedifutamiberexokubup.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/bofatupexukoze.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/62706668499.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614152f47e614---62668087977.pdfIn PDF document text
    • http://uteambio.com/upload/files/82122759803.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/57847772259.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/40419044450.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/24885908412.pdfIn PDF document text
    • http://taxfreepoint.com/file/50597627284.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/gezovixipigiw.pdfIn PDF document text
    • http://ctm.it/userfiles/file/ropan.pdfIn PDF document text
    • http://geotersrl.it/file/pufixexe.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/1164e85bfc1e0d8ee0a92359463d8102/ziposuf.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/dazatawozi.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/2567735687.pdfIn PDF document text
    • https://lapdonline.org/file/42695402162.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 17024 bytes
SHA-256: e945b6617865d24b6c5b8b1ca4cb0c1868fde7b6d13f79cdeaede2a8e24f923b
font_01_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 11052 bytes
SHA-256: f2465e190ede9e4e8af08c84b3acd379422a8082f7f5791ee1b35daf0a8278bf
font_02_sfnt_off000103fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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