Malicious PDF — malware analysis report

Static analysis result for SHA-256 b254bd754ae9a3b3…

MALICIOUS

PDF

99.8 KB Created: 2021-08-14 11:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 44c57ee1287171d63b1d77269c416653 SHA-1: 5765da2b347b5bd8118add96444052217f1cb12e SHA-256: b254bd754ae9a3b35fe5dd7d2368ccf04827bdafed54e9f0aa1f823c2beb146c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with the links likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://evergladesharvesting.com/ckfinder/userfiles/files/revibefubewakoxegojikiv.pdf In PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fde8f175cd---kadariwobuxewikofibim.pdfIn PDF document text
    • https://everestart.com/images/stories/file/47433242599.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/9iapn25bq4aotgbja9962oid82/pazekenejenexabuj.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/vemuoskuldq1kv2js8nchhe2ia/kimuwizixaxov.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d91a027a034---70213411504.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ceeeb1c3f2665f13a4e3acaba4eacab0/merezuzolafarepelub.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/754a678a6c0d64b29a3e7e457d7c0daf/didulilipufezexunolu.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/81504501998.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/521c36d0ad9c2bbdd831e8654944a071/41601686413.pdfIn PDF document text
    • http://forti.in/userfiles/file/kasaxonulovogaduze.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/33tkmmk679or437djb8io77146/86110709906.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/ff669c473e00e616a2da4f61fa756520/63128375814.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/n5n22fmd6thuuef1s8e85e2bu4/metukodawazovob.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dac0e79d7---13618965880.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/54269981365.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a403959ae4d53087b0c82cbce70f50f5/76892633331.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210528_678F84BB65CDEAFB.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/zorajixedodepuja.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/79113643121.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/22892930ea64fde253a4981fbdfd0c6a/xotevina.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/23994637378.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad90c697d5d---taxajebegidubeminak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=informatica+los+cables+por+donde+viaja+la+informaci%C3%B3n+por+un+ordenadorPDF 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_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13184 19092 bytes
SHA-256: d4f5118f1b0ed48b2271d78be43eb7b35448a2564dedd2363761e7655d0026db
font_02_sfnt_off00016297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16297 11308 bytes
SHA-256: 084a84c798f98c10731982eaa122f78abbfa479dc7b3d0797e213be46b29f01b

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