Malicious PDF — malware analysis report

Static analysis result for SHA-256 1427641b5228bf60…

MALICIOUS

PDF

85.1 KB Created: 2021-06-27 23:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 906d25e82fa9a9f165c9cfd02a165d1f SHA-1: 957a0937858c5bf13c7cb40b10c82a1f3f4d39f8 SHA-256: 1427641b5228bf6037142f885395ce2206a5569993c7f2c2dad946acfdde8fd1
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://aartipalette.com/userfiles/file/62546445540.pdf In PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/39783388550.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/89f49fdf8551619d4bd49a42afb37ad0/53716739443.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/l5kmjpmvpifkfcotgt55hgqqc0/kogobamegemomoza.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/g43ekujep0vri0442jcq32mtju/joxojejufaxowuletalotokas.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/54602752963.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/risesefumisuxefowujolune.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/94400045704.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089cbf0380ba---kogutinazozutitemovot.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160895db2eb7af---21425694760.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/wogerudonakuxem.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c98a91960ab---3722476905.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/41505572409.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/gmmilbplm737kqqui9op0h7vrq/42163292221.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/88093858033.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/jivuwavadigoxuruxoj.pdfIn PDF document text
    • http://jaatkinson.com/userimages/tubobetejekosudigopumobib.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/b6608e5f0cc73106023af1ffeecb8288/tixuwegariwanuwoxogilezu.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/33953541558.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/jawegutepipijefaxo.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/e18aa65e278f066597fd70f37ce217d2/61065695002.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072e6e314152---21903408647.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=interesting+facts+about+gothic+literaturePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 10808 bytes
SHA-256: 7d7567e22aeb5bd106375f6064ada5c489283d270e5c8403a2af15e8401f2c37
font_01_sfnt_off000105a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A2 15960 bytes
SHA-256: d1fd2aabcd4af760b577fc5a321d3b5aba5855867e48986aa2ba13124798c221
font_02_sfnt_off00012eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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