Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb7fcb34bd5e622…

MALICIOUS

PDF

94.5 KB Created: 2021-09-15 03:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a74d9db945cda7816acce8b294566c06 SHA-1: 089a3f1ddec9f7538896e08044bc8537308a2146 SHA-256: fcb7fcb34bd5e62296c992e5ca28a3b50548054b7b3668f2d7acfa962c7a26b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm used for distributing malicious content or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://ketchas.ru/uplcv?utm_term=the+alchemist+book+download PDF link annotation
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b7497de3e---63552567001.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/39458939667.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/jikijavexivipugusamolit.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/nolakumo.pdfIn PDF document text
    • http://gysanya.com/upload/file/210911231246861662j8upur1kylxf.pdfIn PDF document text
    • http://njxinbell.com/upload/files/tizowejizajizu.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/godulubirewulerem.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/3minv7j38sj7vfnvr0keq7vq5l/tusew.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210904090138.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/tipenipebejagivukanewamef.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/nobedanoxutinifelazepabu.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de9e0021f3---28329569932.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/25853427193.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/xelof.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/vorapedevo.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/34671340619.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/wefopozobavokafokogox.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210911191611.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/22456783733.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/054762d572ba387eebb50957d647a710/vedenavojobota.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/10474331704.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411d4d3b46d---67424133077.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/sajemokodipipeki.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/77866232622.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/jexolusufutozo.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/zubivukutevogomidaduj.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_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 19228 bytes
SHA-256: 0909b478dbbcaea6f251d8e14f60cf5cf370e0d50f1835b91aca6fbcadc9803a
font_02_sfnt_off0001538f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538F 10816 bytes
SHA-256: 6e76d4fc98626ac0642c132541a485f8786f7874b2ab9fdaf7bafdee2f1f426f

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