Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5a2255ba5b5212…

MALICIOUS

PDF

86.2 KB Created: 2021-09-06 14:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ef5d452d18fda07f39f3f29e1f18284 SHA-1: 90a305dec4354fc217756323f0c491150a486d4b SHA-256: 9f5a2255ba5b52125431e0e08c6d2ce46e8118ad371dfec91b4d4bae05d22e6f
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://garglob.ru/uplcv?utm_term=hp+chromebook+11+g6+ee+service+manual PDF link annotation
    • http://fullcolorspandoeken.nl/userfiles/file/pixezedovibomalupuleroxu.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d71ba3ce5---67208244042.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071571e4ab54---60658260600.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/lowixoxufobomaz.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/56680185336.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26181d090e---selixaxidabefaba.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/reguzemiwororinamelobube.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/88820317431.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64b59bc0e2---dosuranirorolaxejidugaxi.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2b1278499---dofurenaf.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a90e3fe3297df647f5fd03ac6e42bbf7/xuxifamelaladuzonotefisi.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/19156672649.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/rubemiwasipipizabodevukon.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/sexoletideveworox.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/39661441479.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/03e9a78c24084be8e29d9f072b13cce2/sogisunirurenefumunonofex.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7b8cf064---dutivosituximeregeku.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/rofufifoxisamage.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108dce850462---37716348317.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210904160734_823361593.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/23535804407.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e17c2ffae---luridukarexasojirevo.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_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 18784 bytes
SHA-256: 751fc6ccf0847830e4159302e44d6acded02afc256d66e60dd087fcdd69122a7
font_01_sfnt_off000118cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E6 11332 bytes
SHA-256: 97ffbfb4ff2f42567a62bf1b75bf7d974bc69222c514e7247d49295094a29da8