Malicious PDF — malware analysis report

Static analysis result for SHA-256 32636d8d2276085f…

MALICIOUS

PDF

87.5 KB Created: 2021-08-25 19:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fec4063d9114b897dcd39dbd60d5a2da SHA-1: b91e92092634a8f6555a696eceade700f1e53e95 SHA-256: 32636d8d2276085fde299f697e1a0f25c96ef5aef7a39dcc1c44452c6b00ee42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9206d37f27---47048505990.pdf In PDF document text
    • https://dacinsara.ro/fckfiles/file/27658023835.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/kerarobiwefonawatebukaval.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608528300b96d---26321937663.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/10744699010.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/44396550218.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f009ce40a0---makolimos.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/fd57b4ff05bba9eed8bd21c6637d2e42/3211988650.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/givolizebiluxilem.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/2eecfd9c1bbb82cd6dca29d3ffe5b842/63586147253.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e4923a564---vopesogidepi.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/84222327734.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/6081327098.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/fuborekosudowon.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/betikewodikuf.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/83567251604.pdfIn PDF document text
    • http://tano-cable.com/d/files/fovipagapuwokibodakut.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/46008647742.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610fac34c4769---laronebedebanavaxo.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/kilalogelowesokuvodumevov.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/19854429318.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/16344059588.pdfIn PDF document text
    • https://educhina.mn/editor/files/92953393795.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/fikokajotasosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=an+education+nick+hornby+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_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10987 10928 bytes
SHA-256: 4fe42714bd5301ee665acb9dae2b4ba9c56e33aa77c68ab9e3bffed7d67addfe
font_02_sfnt_off0001229c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229C 17076 bytes
SHA-256: e32ecd54180a71a20d4154ab2fe7290cd8f6563e1ba8f8481499990e8399f451

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