Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14f674fe730c5bc…

MALICIOUS

PDF

86.3 KB Created: 2021-09-12 17:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d6f6bf3b8d41ccaaa5bbaa7a3b7cb101 SHA-1: ccdac08f7f39a9162ee837998f4c316d3e3fa8a4 SHA-256: e14f674fe730c5bc14219b8e66418c3c04473e521b91fbbd9210ae3a4f9a88c0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The embedded JavaScript stream and ML classifier further support its malicious nature. The primary goal appears to be directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=best+offline+hunting+games+for+android PDF link annotation
    • https://rpaxis.net/userfiles/file/26507044404.pdfIn PDF document text
    • https://betsin.org/userfiles/files/49150160639.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1d44df6fd---603779939.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/tapegameguz.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/39957961640.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/38538198312.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/85099656691.pdfIn PDF document text
    • https://cosmopolitanhotelbg.lastrada.bg/uploads/wysiwyg/files/perekuralawa.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/56881830526.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210902182558887409neacwv.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/zoxolobeza.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210912202349.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/52815415416.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/silaziwadejabowipuget.pdfIn PDF document text
    • https://alkoplast.rs/files/32166928020.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/21759908826.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/59427410053.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd010e9b6---34288173919.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/pepidixiwinitajapusufi.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/nanobegalavakojifof.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/juxitoposaku.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/14624582068.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/39954033400.pdfIn PDF document text
    • http://strahyi.ru/images/file/96968331210.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/63692662584.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/sopivetudizezutef.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/kugodewulajorezited.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_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 16752 bytes
SHA-256: 665ebb93ef15f791c2d447c722aa7df13f8887572f3a37c87b83c4049698b84a
font_01_sfnt_off00011a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7D 10956 bytes
SHA-256: f7aa62bba1ac999feb1979e3251b31c794fe811f47aababafa00cdc91165c2dd
font_02_sfnt_off0001337c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1