Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e9b9b49ea9be45…

MALICIOUS

PDF

68.0 KB Created: 2021-09-30 10:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7dae9bfb5bf080b36577dd7fa7359509 SHA-1: 6661709d076ba7be584de5c9d06a3b96fad63bcc SHA-256: e0e9b9b49ea9be45b7d5037009a278add140c40dbd03180f29aa47ec9c515cf1
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves directing users to external URLs, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://bordahusfeldolgozo.hu/editor_up/reguloxamogogefazini.pdf In PDF document text
    • http://tvkinter.com/file_media/file_image/file/86099550823.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161527675b212d---49522271860.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/41609185795.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/mokunijedosaxazijorupoxuj.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/63009144155.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6a0f1da49---zewiw.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/47433218845.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/35012338204.pdfIn PDF document text
    • http://myphamasia.net/upload/files/32768487702.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/6190054459.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/31429121588.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/01a0a6f387e03c62947af079bc095961/tasuvufumawali.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16149644238a56---wifefu.pdfIn PDF document text
    • https://petek.biz/resimler/files/78681446379.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbfb7d01d3---mizewiv.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ca4237827---rumeberolorusogizolonija.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/64020715948.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/dedosudif.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/22534143262.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/46658195086.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/16148220272.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/rafax.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/patowogojexifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=math+puzzles+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_off0000af88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF88 10332 bytes
SHA-256: 950273bb3c6369c311aaba934e4fc6baf0d39ac94a9f9016cb7e2ad598ea05da
font_01_sfnt_off0000c714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 14544 bytes
SHA-256: e2e7fd5cb5cf4ebffa5a1e159b0e43641a8fa06778b36613cc0c2d44891074c2