Malicious PDF — malware analysis report

Static analysis result for SHA-256 862d514f156f1fb6…

MALICIOUS

PDF

74.6 KB Created: 2021-09-25 03:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a779678e837111398eebeacce6c5bf2 SHA-1: fed4d931de27f8b6fe24766bc992de36b5272e0d SHA-256: 862d514f156f1fb63cfd7171baa0e0ea420cd207491661bc3595fe94c7c75280
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=how+to+hack+android+pattern+password PDF link annotation
    • http://motivationandmomentum.net/ci/userfiles/files/3068227674.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/26825988284.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/da0a84f62bc343061af30af762ffd455/55999168537.pdfIn PDF document text
    • http://asid.rw/userfiles/file/22110204658.pdfIn PDF document text
    • https://adci.vn/data/upload/file/daporukunodogufizojuwime.pdfIn PDF document text
    • http://z500.si/files/22301785859.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/rusosabudonenedavadaxu.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/44674225317.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/80312254983.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/gawafekifoz.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/8909864872.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/wujunukuru.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/zumuvag.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/sisomepeka.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/redovimosuxukojitodakupor.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/59365021040.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f503f8c2da---89424262671.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/nuvivoluvifutofa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbb8a1dc0f---33446622095.pdfIn PDF document text
    • http://lagrupacio.cat/file/35255036038.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-25/20210925083647332819.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/bedizasosa.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/45638388773.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/ca9a193c6bc3b6664dfbf2ad605ac127/tuwufuvewu.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_off0000b674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 10732 bytes
SHA-256: cd5e3a52074413ad8ed5d096961c78b1fd45bf4975487f1708a4f7e7a7e1c758
font_02_sfnt_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 19888 bytes
SHA-256: 3da3d2b7c0baf37ad18474b3b552580cc133e252c88cb46bc62200a3cc847b1b

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