Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b5f94be50a1871…

MALICIOUS

PDF

89.5 KB Created: 2021-08-08 22:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 475c79194dcf89322a9c32e3ce1bdb20 SHA-1: 3e4de8d23088bb6e8fee05776e96b44ba85a36b3 SHA-256: 72b5f94be50a18717c6587144ac4cb19817f40b08c675eee30e3adcd0eb3a8a0
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=online+quiz+system+project+report+pdf PDF link annotation
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7d54d2da---vofoge.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160806ef31ae99---maxorodogaxasogukixazo.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/xafuwodaxuxoludojego.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/wilugitufokafaxesarakutu.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/24875374803.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/vowigezu.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/vpq6upho656mjv32gv71riahtd/zopuvopelojase.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/12181352833.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/2062155611610647caca358.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0857a88f6---fozukekawepa.pdfIn PDF document text
    • http://siembra.me/uploads/files/fikal.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c53b5eb6a8e---juxaxitefaligo.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/xatusibogiwubara.pdfIn PDF document text
    • http://moristas.com/userfiles/files/xowineregowagudat.pdfIn PDF document text
    • http://gerocuki.hu/user/file/73024427774.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc6dcf3dda---29356567393.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/mojawufirezibozosatezewe.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/vinadoxizosov.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/60125561626.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/31553115417.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/lidufegukedijana.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc396553e00---14010614795.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_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 18068 bytes
SHA-256: 348a9dd2d83c2f0f6ef4d91df48805700813e5a2ba353bf98838f635782cda6c
font_01_sfnt_off00012626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12626 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3D 11192 bytes
SHA-256: 234ec701d4470e664c6a5a9316903030bf6eabad7c36fc9c946a2a82c87f35a6