Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7089d4c2dc02cf4…

MALICIOUS

PDF

69.3 KB Created: 2021-10-02 14:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 780ab63d380c14868a96a0f40f7f0ba5 SHA-1: c8f9fdb6dc4c1983aece15538cb2c5c52b2f1916 SHA-256: b7089d4c2dc02cf480fab038be2aa5761732ad3699c063ba795ec26ebbf8c2fc
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by a ML classifier and ClamAV, detecting it as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The document body is unreadable, but the heuristics indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://importfoodfair.com/userfiles/image/2021/09/file/riwuxakiruvunumomipa.pdf In PDF document text
    • http://sfssolution.com/userfiles/file/pategepozidew.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/079f78d56f87d5ae8735a367a506f49f/fuxapovenasulokufubem.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/93640698793.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/vipinuwatoronaseloron.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/jizawet.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/73966216117.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/getatef.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/sepas.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/fejaxadokomejizijuvagep.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/kewoxewib.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/zeriruwosib.pdfIn PDF document text
    • http://rayer.cn/d/files/kudexonuvasi.pdfIn PDF document text
    • http://darec.sk/files/files/pipetedafafazinigilutobe.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dfff0a3e45---20605757546.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/zozujoxubiworoguv.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/xijigi.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/41460452816.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/ximozulutig.pdfIn PDF document text
    • https://beaszemin.com/files/zijosesawegexivigepun.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/rejolibezitudas.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615110e1e5b51---wirewunogalibutiwetex.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5670e8546---69633975054.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/76309374760.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/dajili.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/21785842893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=meaning+of+dare+in+englishPDF 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_off0000b3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F3 10528 bytes
SHA-256: e01ff9c7bc0c7e1d956eb1a02da9ef3a11dd9dd6cb7ee143cc1b1c834a621970
font_01_sfnt_off0000cb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB91 14384 bytes
SHA-256: a9753d6287d1c4e236ff063ece2c2d413e83849713eff1e70db9f8e76fe71114
font_02_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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