Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee06c473faf5de6…

MALICIOUS

PDF

131.3 KB Created: 2021-08-14 23:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b2f2c2afd3ec945fa54a90d74219dade SHA-1: 736698800995f478a2065b76e560917ec8d4cb67 SHA-256: dee06c473faf5de61c890b69e6ac0f86cdddb4ced84d5ed4f08b034540658b91
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan distribution attempt. It contains a link farm pointing to numerous compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://tcsm62.org/uploads/news/file/jujowudakiwabatofovonijum.pdf In PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/madunovulibudelo.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/df9927419ed15048ef8877e0a7b5ce23/36199316792.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/28911003807.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/bevafesefililenof.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/kalevigiwiribefawuvapa.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/74537087101.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/guvirofofiredazukiju.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/3i9oquetvnc2a69fitubea3hg7/43753544840.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc05e77309---xujewopidevejafivujubo.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/putabawedi.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/89994250336.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/66cd098b0293b1e420512e1358461933/95036600995.pdfIn PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/73913777458.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d8c0e8191---leduxokexok.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/xuxeguna.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/bueqihk7sgpijqmjl6ptoo38na/gutoguxumaxil.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/77925824560.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b25dcef141---64715665938.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a82e5526a---38795531765.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a929d2b3bd7---10145802028.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/vetawed.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/kobuguvusanoxolorub.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/tasawawoladajunetokixova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=telefe+dulce+amor+capitulos+completos+124PDF 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_off0001969c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1969C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001aeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEAE 21024 bytes
SHA-256: 61401128eaa81e7d58fb3722d17de9cc95b11b366b31bd8a079012e55478838d
font_02_sfnt_off0001e370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E370 10992 bytes
SHA-256: 5e30c488c0e78332e0a03fc830c8beb9bb78e99e86191b4a644da62fbbb2ffe2