Malicious PDF — malware analysis report

Static analysis result for SHA-256 d669dc4ae1994db3…

MALICIOUS

PDF

86.7 KB Created: 2021-09-21 08:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d449ab0376249d70988547a359df3ce0 SHA-1: 9891217c93373c493a81d373da01313868f6790b SHA-256: d669dc4ae1994db38968683563330825428982c892e6b1b3d71407ad73faac69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, many of which host further PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a link farm, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=mashaal+full+movie+download+mp4 PDF link annotation
    • http://archpiudue.com/userfiles/files/zanodozigesifumog.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/gezuzamevexak.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/rabexomenodogalazovova.pdfIn PDF document text
    • http://packamate.com/userfiles/22800731192.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133245e63331---fadapaxejibuvuxijikexoj.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109110116132129.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/limiginokiraxup.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b2551b83da8db4603a49cf41a2a6e8b/27072073740.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/befawenopetawe.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/jokonuvokasiburofowijup.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/6494433545.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/zofokose.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/javutatebibelivajixinor.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614003c3f2808---lituxazezatabilogor.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/binupipowudajezasa.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/molidajuniforomesijexowez.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/viguv.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/95470940664.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/wofasivotamuxu.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/notodulamogoketiwujeza.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430974476ec---52003982264.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/moganafo.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/wizamenidenigumeradog.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613698507d0c2---rusurazidafevi.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_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CB 17756 bytes
SHA-256: 07939b9b5b792647a94a35554909bbb8e57a42e0041ee7535457f6bbb7201c25
font_02_sfnt_off000133fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FE 10888 bytes
SHA-256: e8e82b43d5fe0b180b8326c6e659daeaf346a7f95872b7bb18163d026ff8e6f8

Open this report in the interactive analyzer, or submit your own file for analysis.