Malicious PDF — malware analysis report

Static analysis result for SHA-256 9596f197874242f6…

MALICIOUS

PDF

82.0 KB Created: 2021-07-16 12:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b9c69caea97adb7902e89ef6cb7ba46d SHA-1: 0ead944de95238819d24ed160c0ebb0c91dc93fa SHA-256: 9596f197874242f69d3bb6dc1b7fd50e7b26171953d93ffe75a8e58e774ddc5d
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious websites for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/47d2d62d8b3458e8c7b15867f2ed4996/8622751494.pdf In PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/9cb5457db8710be618594742f5189e4e/rivosivavukisunanamububex.pdfIn PDF document text
    • https://777mto.org/contents//files/relepukadituxurizitalok.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/pivuvojiwanofuwa.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5dafd963b9263d8d4f016aac07658de1/tosimeposo.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/gezijub.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/72703877371.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2940661c088813f39fc27ccd2c2e7881/suwanamefetigolifex.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd200caef---webuwoxu.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/gowofikunulowumuwapede.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608517bd899a1---kofakekuwipanorujigi.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/18922585322.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/motefirenixiruzitun.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/37677937805.pdfIn PDF document text
    • http://builderall.info/userfiles/file/29676572265.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ba863f5b---wopakafizozizixu.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/bogunomiwevizebemevo.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/jomis.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607844bf2db0b---1761210279.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7997f49f7d---16877419029.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/18713046218.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a246b91d203---perogukiperudutigogagoxe.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e51cce236---boromevetefumipazal.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/efbc15cc55188c46963ce07818dfa8de/34100576725.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b2c7d32e5110af4856242fceedec0192/mowalemalamewudepade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=32+multiplication+tablePDF 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_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 10704 bytes
SHA-256: bc6725fc4c3e611ac04d94db11a3813f55228d6cb6d6ddeb1a11079985159c5e
font_01_sfnt_off0000f830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11042 16424 bytes
SHA-256: 0399a308fb747194f9978af770b2d8955e2855b49446c5237ae44b4c287d1e51