Malicious PDF — malware analysis report

Static analysis result for SHA-256 9276b2f40e198f8d…

MALICIOUS

PDF

85.6 KB Created: 2021-08-17 06:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e437cde432eba46a6aecbace24696341 SHA-1: 9160db8e7d8e754ac699cc2dc526b07b12cab2fe SHA-256: 9276b2f40e198f8df7d91bf9b2c07f16dc83d587503235448be35570a162435e
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://jrmhandling.nl/upload/file/84278355683.pdf In PDF document text
    • http://artside.org/data/temp/file/gurofiludafojujejubijejij.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/9a22c5f9132d24158506d7d48fe0b73a/rafad.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/39qajpqv5rs2522orp13nre3t0/dufudiwisofiwud.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/99402522962.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f8f1473a0bd0d39133293d9453e42b9/gebatowilo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd3c4309d0---478748976.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609458b6d86ac---pafowujotisuw.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3828fdfd1e---25061791883.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608515126da1a---21073544794.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcf0bc0dbf---17320544967.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b09a1da7cde---38654105240.pdfIn PDF document text
    • https://ekransamara.ru/files/tokojelilav.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c735cf1f124---dasolo.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/14817434033.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ano9ud16lkuf7mj67goik57hba/lowejamarumifiposat.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/sivon.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/t5uqg64qoeidg5pnojsp56qf1m/vesewubavower.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/vusuwaro.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/vuzutijoj.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/rgu2f752h3j77439i53ds6d2p6/62368593884.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/wijuzad.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a65221af4d1---rinukeruxegutumanepudo.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a7642395ac---28348016173.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/2877933104.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=mcdonald%27s+menu+breakfast+prices+lahorePDF 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_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 17816 bytes
SHA-256: e0745bb043c4d011add508c3af6259e25a7969a5add638e14ccadb7f5bc5c6ad
font_01_sfnt_off00011499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11499 11244 bytes
SHA-256: 76495df23f2910679534f419f34495ef39818e7b2fa821234955d874971998e0
font_02_sfnt_off00012e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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