Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b226d8f9b8e513…

MALICIOUS

PDF

80.2 KB Created: 2021-09-12 08:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: faa33d03a8081362609199265fcd1087 SHA-1: aa00474e6f7fd433a073d1a58264be1c07fb6b95 SHA-256: 27b226d8f9b8e51341ec15f7314e29fe83267cce99267268c9075940302e929b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm, indicating a phishing or content-luring scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the link farm heuristic point towards the file's primary function being to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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=wwe+universe+mod+apk+download PDF link annotation
    • http://rrarental.org/upload/file/pujinikadelemim.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/mafej.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210903_8AE389C502A6C400.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/eb759b6b5d167bfaa4ec6f00b8916320/36940486233.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/fuvixaxejez.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202192858375154.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/71725032830.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/4305339858.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/bevepe.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/dukixezopurijes.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/12743267557.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/kowajotawuri.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/34583471928.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/wikifozi.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/voxinenuj.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a69ade6af92137ab0b6af3c19ae79c5f/4389403220.pdfIn PDF document text
    • http://temple.mo/userfiles/file/54420553681.pdfIn PDF document text
    • http://idcla.net/upload/files/xapuzozuzusen.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/20554729559.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/83184330014.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/pexefejawaferupet.pdfIn PDF document text
    • http://fitviewer.info/files/file/95539510538.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///luwemejisilusazigabupakim.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/ximodujij.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 10792 bytes
SHA-256: 8af895fc62ca0ce049da15df3576e6234edc2647ad0bc49851a1085cb4bc61e2
font_01_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 17128 bytes
SHA-256: a71b5c669b03f15537277e86625dd5ac52337e006a9e28996f0b70ec3f041bc7
font_02_sfnt_off00011aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.