Malicious PDF — malware analysis report

Static analysis result for SHA-256 1471f0eed915af57…

MALICIOUS

PDF

93.2 KB Created: 2021-08-14 05:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1fcce3e28542dcc5dfd84e65f8c231c SHA-1: 755cb06531b0fa98b44a759ce61d145fc95a73cc SHA-256: 1471f0eed915af5798f75a2a593544c2772b185a3d34b28cace4d987744bbed9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, some of which point to compromised CMS upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://clair-environnement.eu/catalogue_dynamique/file/kamuxitufetawuwetokitixap.pdf In PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/fetuburewavosa.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/d1dc93ac9e729fd88bac838b33deb0cd/gugof.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/bupejuger.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/be92cc9f63aad97cc8af47d8137b4651/jixudegavowowu.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/75913893511.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/24817687393.pdfIn PDF document text
    • https://digiconelectronics.com/media/59783117581.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620339307.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/zigiziravilijake.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7d8dd7063---joganarok.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bba6f3020fd---32017519158.pdfPDF link annotation
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a192586863d---57645809418.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/51201840062.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607588f6ce702---92706557662.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f408bc968f1---60014712369.pdfIn PDF document text
    • http://polipack.ru/content/file/77769012526.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/domemiropin.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/govolavisowubabejuveva.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/965048182.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-8-3/20210803093815106197.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/96ovgsgghhj8cputoqco8p1rqo/39044398853.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/f8us170l5s7k3th935rcfpak19/vexumasavonudadagiwalosat.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b639dae09d4---39025267077.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/wuxaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=equinox+john+coltrane+piano+sheet+musicPDF link annotation
    • 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_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 11100 bytes
SHA-256: 82126038f957adef303465f9471a1a9469ea2ca81e723813b53869e04fb3f365
font_01_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 17972 bytes
SHA-256: f8be38a4351d9fb199b63a180aa1b1f3e170db2e38d93c13b711d8c6cbda545e
font_02_sfnt_off00014b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1