Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e7e8d63eecedb…

MALICIOUS

PDF

125.2 KB Created: 2021-08-01 04:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c51e72bf5b1249dc2a1426b6d19aa854 SHA-1: a116a5bf17aa81d92447b6c0a5ef31363b85c001 SHA-256: 722e7e8d63eecedbb68f0cbaea0f5799fe6bb271e71a0bedcd7fc797d4fe0de9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=into+the+forest+of+fireflies+light+full+movie+english+dubbed PDF link annotation
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f3c047f5b---vaveperogidafasapupoteso.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/duvugetanizovixi.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160808af0ab02d---xawuraramojonabovakud.pdfIn PDF document text
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/31812015494.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/31906668912.pdfIn PDF document text
    • http://polkovnik.su/upload/file/1570408383.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/61114725832.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/ldd5h9jegg6s6c5ighlscokti6/7447051092.pdfIn PDF document text
    • http://chichen.asia/ckfinder/userfiles/files/5171783609.pdfIn PDF document text
    • https://adikkedua.com/contents//files/3816264425.pdfIn PDF document text
    • http://hakemokulkiyafetleri.com/upload/ckfinder/files/xesuxakogigirukotisu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e72daaa01d---73473729553.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210712_2051F64803AE9195.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/g8jsubk3782iomo9n3blab7ia0/vorowutiwowagagomubo.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160837662bd15a---jagil.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/3324288920.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3daedbcdeb---10305698318.pdfIn PDF document text
    • https://castel.ro/userfiles/file/piwafeluzomivamileketiv.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289b45dd3e---72977959541.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/xonepotepurarafusuwu.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/11426653584.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/wujavudepefodofixi.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7e71a0b24---11817291227.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/ng8gff23eolan8o9kh5u3vvgp6/96734461168.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/cd297b65de27c6cabb747af251548edf/padabomigebulo.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_off00018506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18506 18608 bytes
SHA-256: 2878988c0654ee9d027a2a55b0c67d3b146aeb874f3f022b4e5ba4425f599e09
font_01_sfnt_off0001b4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ccd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCD3 10896 bytes
SHA-256: 3dbce311b18d4d607006cd6838914d4c51f23149046d35c342afaf0911cccf06