Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46e01d49e0f0291…

MALICIOUS

PDF

75.3 KB Created: 2021-09-05 09:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 980285ebb24e7014f9c44e0ce0d17eff SHA-1: 12ab4671c6c1da637dc61cdfb29444cd96061b47 SHA-256: d46e01d49e0f0291f3a26e46695093d4207a315adfce3e6267e1b3c480427b89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised websites, likely intended to trick users into downloading a second-stage payload disguised as a driver. No scripts were extracted, but the presence of numerous embedded URLs suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/gajejozusexodedi.pdf In PDF document text
    • http://solarissoft.com/img/userfiles/files/pofisekamow.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/muvuxavapu.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dee4baeb331---57561418893.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081c59caa5c9---14332557219.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/pogibijaxeletasomum.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dd0b99a0b3---sojego.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/didewurofobisadewanime.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/temekibokafine.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d46f8e3a5---nidamizafujope.pdfIn PDF document text
    • http://ombs.ru/uploads/files/92216320647.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/e6e8137d250cc3f2be7e97adadcdc5b4/2415792993.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132cbdb26ce2---xirivazojefikiwemuzatoju.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/12090058801.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a502a7a9fb3---89476286588.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c45cb966135ed2c6f05d92612d2a7042/vobavonifabovuzekibe.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/90743433684.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/talusatatuzolewarezadowol.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/vawepakoxumur.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/dikemifew.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/92804092089.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/5d379d9145012c17d687349254f8cccb/50453100114.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/gasadafewubaretel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=gaaiho+pdf+driver+downloadPDF 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_off0000c4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A6 16716 bytes
SHA-256: 7bbfed9380f5fcfb38c42f38b91cc03fda208dc6f560c29fc234021c455a01cd
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 10520 bytes
SHA-256: 6132fd533decb34627d72c1fe890c2906a6cce656b3f489f9cd9142189470204

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