Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d76472d948b34d…

MALICIOUS

PDF

85.2 KB Created: 2021-07-30 21:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1959b6d5f4ec4bb1e19e28ec2a0007d5 SHA-1: 9eb62ea89904fe0573e7578462d8651ef0cb60b1 SHA-256: a3d76472d948b34d76f9da478e8c97a7393b30a62f2d6878b50e2ada2dd98130
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses urgent language to prompt user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://promise-land.com/upload/file/15700800667.pdf In PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/dq94e3ca6471u2p0p6sh29q0qo/8017112664.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/pinubasojuraz.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/30178526036.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lqq27iiu02r7h37h5gu62v4f5q/15265391203.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/gopisufuwepudaf.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/duvej.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/mpnj6uc5nmaq4d80b3ifqnsfm2/mobokesibalud.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160761a4def89d---bazos.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/e2b2db07e57f385ed1a52499e1bc34be/kadegosofel.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/37428878930.pdfIn PDF document text
    • https://lemanssrl.it/file/15262716059.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/28875195014.pdfIn PDF document text
    • http://techbis.pl/files/file/64710373981.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd84c1b2a3---40369078264.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/56orkqtalaqi7ogc201ec2nmk1/12486066851.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/23494887258.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/864cbc89656ca65a8de615465fb89746/42316758394.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/8e8fd8075ee7d87f884bc4ebff332ad9/44370043119.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vf4jt9ovfnbrch7vb15pbd3pjl/vikuwokorudolejev.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/md2tucf9q7tpgvo92q10ugieuo/73901522201.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/1779313923.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/kovowa.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d0aa4b56d---rowejakasekojawoj.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/011f1c1cf8af32aa272e6b3145a02535/75046574938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=goal+live+tv+appPDF 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_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 16724 bytes
SHA-256: 1303bd7c2efa56f5b9996ab80dd81403f05f2766bd256fd33892a980707fd948
font_02_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 9976 bytes
SHA-256: 102fc4172d32b620b92bef1556419e8296750610ddc9fa2f84aab24133e68601