Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f04ba094e79128…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 05:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1271069e3dd399898fcd0d3613ca567c SHA-1: 3ab2c7b6d63e12f6fa862d7fbf4b414858a3d1d0 SHA-256: 69f04ba094e791287718b13c1354d0890c7f3745f86fca3ac05bc77479c10c3d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous external URIs pointing to various domains, some of which are hosted on compromised WordPress sites or disposable domains. The presence of 'utm_term' parameters suggests a potential phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=bulk+resize+pdf PDF link annotation
    • http://www.udelimpa.es/ckfinder/userfiles/files/jeweriruseziguz.pdfIn PDF document text
    • http://alltechsro.cz/files/biragigikir.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc37817147---busofofuxejifitigagedanuk.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072391db8046---18738286924.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d012ddba3---15471775973.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5258d2e5a54d760fdb0fa23f853597e3/31975983366.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/pidejeneruvurizerujaji.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/40c4d152c9a08cc2ab2b08c0eb63d862/fibujes.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/90e7f69e3f8cd34223bbe78f28229726/35039331463.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85496205861.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/82560343496.pdfIn PDF document text
    • http://deauville.ru/files/file/75433287666.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53c741f6b2---rakif.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f85fd3c527---27750199119.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55524e8e4e---60172505249.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/koreparevada.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///lapidesafusewijovij.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/bebazofori.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/muralejojobodesodi.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/12333728255.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/12278774048.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/9366d580b548a9f3d8ad37684d112ed7/lawewufutogofufisikipid.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/83822101383.pdfIn PDF document text
    • 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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 10312 bytes
SHA-256: 025368ae6fb77dc3fd799f37fe840616a55b2302d6ed145d424de28b3a1ce03e
font_02_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 18168 bytes
SHA-256: 0267ec931726db51d6c78ef3861493e904c51942799223aa6c596c1ae6d8f898

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