Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e871a708aafbe20…

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 20:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8598c91dab2a863e6fde4e9fab8f617c SHA-1: 9c3dfcf22ed25006b4ee77bf63f961c106f316e6 SHA-256: 2e871a708aafbe200fbff90fadb1134aeacec403deffe16e16b66cfa2e1a33ab
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous embedded URLs that point to external websites. Several of these URLs are hosted on compromised CMS platforms, suggesting an attempt to distribute further malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://thuexedanang247.com/uploads/image/files/kejisojubozigavemaf.pdf In PDF document text
    • http://cartopack.com/Images/file/bimazuwaxip.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/74489965814.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/c15f63a626327fadc3c66288886f0a11/89823536985.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/bezetubabijunajepowupat.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607906005cada---5338870721.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c63fdca9a6---mefuxelarasitetud.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3d39f1b66---24358484838.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/eqo1l9fvfu2diu9be0tqeajv85/65716684599.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/1c1d43c8b664a28b75acadd04fdca2eb/19149459178.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aa8063d9e---jabimazoxetobukarobag.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc257226a1---jonamato.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/p5qcjdslctangakghnihig36j7/figijozam.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/d9e98116f2272eb8ba702e9abc1220ce/lekazuzutarexa.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dabf288a4---benopa.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/guwopuxebasazulaxase.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b31f6512edb---11223618197.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210716_E0BEE44ADD8248A4.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/bowurowuzajisovedixaxopaf.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/xebuxakoduzoz.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5fe80ac14---datitajawazutajubiw.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2f0164590---82136861483.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/nukumekepapi.pdfIn PDF document text
    • http://ashioke.com/images/library/File/fedelozenolazateke.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/wojapanuzunarineluwutasok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=compr%C3%A9hension+%C3%A9crite+fle+niveau+b2+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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 19128 bytes
SHA-256: ab9824f427041ddb381559724a57192631395e7d8688b79d716722b2cd012ba3
font_01_sfnt_off000124d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D0 11496 bytes
SHA-256: 01c37c4f884626ff69bdbdc666ed7b0a70bbecefd7ee0dfe2b7b99c587ba7c34
font_02_sfnt_off00013f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1