Malicious PDF — malware analysis report

Static analysis result for SHA-256 748819a8a7cc3d18…

MALICIOUS

PDF

82.6 KB Created: 2021-09-08 21:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7abdb219cf26a00933fc3cfcb442ae5a SHA-1: fe7d1e7ab5b27d7aaa3ca1f42c545e06fcc73688 SHA-256: 748819a8a7cc3d180c526f4b63c12027c02c0bd9aa34c7b1acb66d02cc3db47f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly indicate it's used to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://philabc.ru/uplcv?utm_term=technological+advancement+in+agriculture+in+the+philippines+pdf PDF link annotation
    • http://americandeliorder.com/uploads/files/3168159240.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/94455000824.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/nefebu.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/88841711407.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/43945417186.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/9c72055a90a0e436b6673d256ead7fc6/36535307807.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210908_730604BF343BEDFC.pdfIn PDF document text
    • https://papiratisk.cz/soubory/xedas.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/adbdbfb6831a8945f28e3fc9270cf3bb/bovabuvekefirolulope.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/sesame.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/dugopemabosedotalawuj.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/xupafofivok.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/54239394178.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372ea653b00---lezipirinowezibupenivojon.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344622eb316---45132736107.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cfdca218b---70648140357.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/viwimabosevipizera.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/p3mi95jifqr5nst89g7ast9e0o/30788637405.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/mananirulawaxu.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/75159656719.pdfIn PDF document text
    • http://mc-opony.pl/files/file/nejowibemipogakexojalawa.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/guranififixujigorixe.pdfIn PDF document text
    • http://ihdbd.org/upload/files/92101753682.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/14414376849.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_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 11196 bytes
SHA-256: 0821df75cdc1a401ccb5facaf0a192630c2a6e1ff19cac02b73eb688ee741f6d
font_01_sfnt_off0000f3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0A 18592 bytes
SHA-256: 4b672cdf00a0efab416048572ea4323420dc96f3fe0a4264cd262207054ebe86

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