Malicious PDF — malware analysis report

Static analysis result for SHA-256 93702f9ae9948045…

MALICIOUS

PDF

78.8 KB Created: 2021-09-12 12:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 739dfb0ff592d3c730ad38c6c3cd3c5f SHA-1: a6d63a0a2c286143712f73bcb722726e96647660 SHA-256: 93702f9ae994804584571fccd684d4215b6a155334225c0f0d5d05b8d32888b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://apluskleaning.com/admin/images/file/rapumetasowumaxeva.pdf In PDF document text
    • https://petpetmates.com/files/editor/file/davekubifekona.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/93402636026.pdfIn PDF document text
    • http://kgmda.com/upload/files/zuzeniromimelivewixozeze.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210904163121.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/ponagufu.pdfIn PDF document text
    • http://shopabrang.com/images/files/setuwewukuro.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613549a172939---fosazopilurox.pdfIn PDF document text
    • http://strandedtattoo.com/file/fokefebidemuderizawegaf.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/wufop.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/jugivawasege.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3b8b3f51442fc107d42f695eee79e0ee/85026769311.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/dutotirigoto.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/lasezupololanexazo.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3i6cut7pid2dddieq1kc443khr/gasitozofigavojipivet.pdfIn PDF document text
    • https://proxkimya.com/resimler/files/42530399671.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/desuzonunejanazifozop.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/41394075816.pdfIn PDF document text
    • http://rc-modeller.se/images/file///siruxewuxedojenapiwef.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/ladorexeninekutop.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/mufar.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/zalidofokegixapexob.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/17229298175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+art+of+hearing+god+john+paul+jackson+pdfPDF 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_off0000ccca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCA 17748 bytes
SHA-256: 4585e9932a05efa1a2cd18692837ca01c9226bfa318b40b5409fa54aae85ca24
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 11184 bytes
SHA-256: e0ca1fe5e392edde314b24cf1a488fa9a6f23ffe559b877a1093cae7ac7de284