Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69505f3d24a3abd…

MALICIOUS

PDF

79.7 KB Created: 2021-09-15 14:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 80009bcca0dd15559c29d8b027ec4212 SHA-1: 9f362fc18946d56dd66e79f439e6495eb16660f6 SHA-256: d69505f3d24a3abdf9e295935e7515e066a36b3bdde4dd7be8d0c849ed7fdaf1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms. Heuristics indicate it's a link farm on disposable hosting and that it points to compromised CMS uploads. ClamAV and the ML classifier also flagged this PDF as malicious, specifically as a phishing trojan. The document body is unreadable binary data, suggesting it's not intended for direct user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://lube-stc.com/ckfinder/userfiles/files/govisopiromezorozexolopov.pdf In PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/57460507792.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/doposejubaxemojemored.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/majulivojopazeji.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314e60af493---35242730610.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/wimaviduzogum.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/21828267303.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/maboxileligovuweviru.pdfIn PDF document text
    • https://mbbs.hr/files/55296428353.pdfIn PDF document text
    • https://begili.com/uploads/image/files/keliwigov.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb248fb32---susovawuxajexupev.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/77464269453.pdfIn PDF document text
    • http://torgoborud.org/images/file/75964999377.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/21768905542.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/47351478176.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/75524356858.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137698ec8f5d---8621212691.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/rujinasevazalora.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/cr8pfqurk5qirc9fli4256vmg1/66031921501.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613319ecec515---45622479104.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210908195117.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/33541390610.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/figeki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=longman+preparation+course+for+the+toefl+ibt+test+3rd+edition+pdf+freePDF 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_off0000cb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 19328 bytes
SHA-256: ffd124c1f626ed8422c2e59a39c7e6e6f30b30b88a48ef773d19c619bdd96479
font_02_sfnt_off000115e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 11436 bytes
SHA-256: 9c30c1a29220dfebe1522bd873052f9975acf87d9537af662bd1d6e36f491247

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