Malicious PDF — malware analysis report

Static analysis result for SHA-256 974344074b942d05…

MALICIOUS

PDF

83.6 KB Created: 2021-09-22 21:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9e26a83f970b1d97ee72522f2cc5f428 SHA-1: 25b1139458f67879135f1c037da451a3c2d51ffe SHA-256: 974344074b942d053ebb1c55d3b16d355640edde768fae02fba8ac4a511728b2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It functions as a link farm, presenting numerous URLs that point to various domains, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://spalovnachemolak.sk/userfiles/file/85839125786.pdf In PDF document text
    • https://maryamghiasi.com/images/upload/files/fafifevexobetedidafenu.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/ea40dbbed1a0fa18937219260f7585e8/komekurapu.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/diperelimulidisa.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/ligazaz.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/rokajiwajetarapemexa.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/wizizaravuzefatemediki.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/14375660463.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/70729037224.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161312b6b3a4bd---dogenotewon.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/65661807976.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/54914151425.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/18493478338.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/lefugotidufijenuxuxabu.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/75648373842.pdfIn PDF document text
    • https://masihpt1.com/contents/files/77457986659.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161474fd54705a---76141654914.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/nozifakikip.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/58815206339.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/wodutopelapiga.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/bofolofog.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/bedinowetaxobijafolesuj.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/56460896484.pdfIn PDF document text
    • https://sanagustin.cl/files/92725746003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=tom+and+jerry+the+flying+sorceressPDF 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_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 11132 bytes
SHA-256: 58e19dd123c9a0fc4d6400a653a00fc9117795911cd95c11adbf95b2625a1221
font_01_sfnt_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 21112 bytes
SHA-256: 63f7923d939cb4f55cd9983351bd237bbf05e736bae3af0bd31eb8f3c8c822d1
font_02_sfnt_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1