Malicious PDF — malware analysis report

Static analysis result for SHA-256 017d206b0d8d911b…

MALICIOUS

PDF

87.0 KB Created: 2021-07-06 14:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dff51ad89749f18d85a0b452499cce09 SHA-1: 82d3e6b2c8b129608639ea61fbc67b3e280b86e5 SHA-256: 017d206b0d8d911b821bec68dba389daae64815d4fd6cdec574a61c7f42e9d56
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings indicates a pattern of using link farms for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/fv83tn3jjn4ec2i3ninlo1tqod/85076881310.pdf In PDF document text
    • https://ikima.fr/uploads/file/83634422285.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/5g0pmuokdui1mbpvsn1tbir19t/moxebofow.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d77dba9c150d6c30661fec28ccc12cd3/gudipisab.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/tonasamowafisoxa.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/84858644404.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/0d2d2f3b1c04323fd4805d3727709f78/tolekozatu.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/35967295091.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/83610789544.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba3f96d4bc---48417915711.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0469d6a262---bogewojegosomekikunup.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/batunagozopegifulib.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/mafoviperibopojapewa.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60b004111---15586186040.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160818f7fcfd9b---68579918039.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7783612c4---xidarijixujonovabobiri.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997c8f23218---wibijekalufukesawegij.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/527f80f337afdd6fb93afc2c7519d3aa/woxewasatosimurulobikak.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210706_5E81A1DAD2838E0A.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd571d3e6d---26509164001.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/zuzoxebamekiripobufum.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/ketekerumonepomotakibe.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/85752878800.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073793a02193---34556397610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+mummy+tom+cruise+full+movie+downloadPDF 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_off0000ee3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 17640 bytes
SHA-256: be381701f0351cba6989055cc01e0b754a3e0e0584700d9f339e30ff12f6cdf3
font_02_sfnt_off000134a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A9 11068 bytes
SHA-256: 1d0eb8a4e0203c3eb594972bc2c80ffb2399b62ee4ccf84b497345e7fe67443a

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