Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e47b6a095b3cc7e…

MALICIOUS

PDF

88.7 KB Created: 2021-06-29 17:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 770b50731e83d9e43a34762a6c357e40 SHA-1: 4ce2d5c8c085026472955568952dcdaeaeac9429 SHA-256: 7e47b6a095b3cc7e89fe66b30456d906f2b76caa6a69389787e2dce8ade14f39
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The 'SE_CALLBACK_LURE' heuristic suggests a callback phishing or tech-support scam pretext, further reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ed909220dda9c2fc4272f6e6895e9d5f/48318052978.pdf In PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075b98586957---lupolimelubunudopunixe.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/1ff4818fc3bb8f180411c565e7971b17/20111956743.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lj0gm8epqqm9nfrgjuo76qld20/97224734241.pdfIn PDF document text
    • http://www.centralperdana.com/file/64589620458.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/r8d2agn3snrjibpb71hk3emif6/rexagorubotuv.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/7el38p0fbvtes17e7fn3ldrjv1/savovizavomalapexojiko.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b6bd28181c2d9555477e5a9d3e1c431a/19011608322.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/18364543926.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/38829795279.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2543cbfbdb0d9ba3a06de45f4fbc23b8/femavuxi.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be08e999ad2---2531723005.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c090036ca---wesirudipik.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d04e96679---fozirewuzo.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8fce062m3sv0ogsjdfnpgoo7u7/mufisogepeziteposami.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/541854d15ae7999b0564bb6bec577e36/21877981474.pdfIn PDF document text
    • https://beliangka.com/contents//files/87641128063.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xepalaneketuwosoguvide.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d73a0a7bf---99563383518.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/zebezexa.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/pasaxunaduruloxo.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4227a5563---69034549526.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/jexoxi.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/kurabololunitufunekazaniw.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6838cb3158---85171438077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+do+trailing+stop+lossPDF 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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 10512 bytes
SHA-256: 704b38e9bf50b515f3ef199c5026968eec1d85230d383a6ec2640eb919f02dcc
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 17304 bytes
SHA-256: 1a4b208f52068cd736668056ec92f7e8f2005f69494e223310f38a96a23fafc6
font_02_sfnt_off00013be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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