Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10ce62c80c2db3a…

MALICIOUS

PDF

77.7 KB Created: 2021-07-24 07:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 469370613460166a7e312f66d6a5a927 SHA-1: 0d9b0543b0be0858550b0151c0e29ca3daa60790 SHA-256: d10ce62c80c2db3a4cff473f160fa1ffbbc3a377ff339aa1042cf1b10a5a4966
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://alarouba.com/ckfinder/userfiles/files/dategesipowamukug.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b3eb7c98b---nusenalijojibad.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64a0ea1e7b---femoliwusixogarib.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d17b1335---wuvubudakipomimofoki.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/gijodesezures.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/13104918121.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe0041c9b3---31887254027.pdfIn PDF document text
    • https://bfull.ru/uploads/files/mubowinezimotalozofofus.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869b3dc3001---42541770191.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5fc55ff44---vojobejetabasiliwabuvuro.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd7dc73bd---nafelujuvibure.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ql8n2tvl72gceg651rrr345b60/jerilegegulaninorusakabar.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a908b305b39---86236393486.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/nozivapojub.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/7142577109.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/19906620340.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f2437778bc65b7a3be93ffdcd079625f/sujojige.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/9b4cfe22b027b23f5671da084bf316dc/81163284210.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/86563664289.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fcfnao11o52205tkrncmvdbgek/demesizozabamejiwud.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/movodudi.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/vomuladew.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/2874c7e42b9959a1f38bdc95f413143c/dorupek.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/1218c41b0008318bdd0ebb7d822fa92c/41917606798.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/njipusomrj0m8tdh00guc6st5d/39392725055.pdfIn PDF document text
    • http://abc-tel.ru/data/File/kazowagifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=antrenmanlarla+matematik+2+pdf+indir+%C3%BCcretsizPDF 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_off0000c81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81A 11108 bytes
SHA-256: 0b5c9cb7f42b17d6f21309927afbcf8f8af90416d64661978b47428c381487d1
font_01_sfnt_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 17700 bytes
SHA-256: 140fc529b420e75e0eb105abec12b249f502a415eb59d095bac261c22f86577b