Malicious PDF — malware analysis report

Static analysis result for SHA-256 402864e076d6b17d…

MALICIOUS

PDF

97.4 KB Created: 2021-07-25 20:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dc6e6309dce0e349d61c8fe25eea52aa SHA-1: 11e5b13440cc23c1c4035ea0b883d0d394ed0b32 SHA-256: 402864e076d6b17dbb9c27cc9bf50a595d8fd54fbe76f6180f8b86e54e8aa975
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and disposable hosting sites. These links likely serve to redirect users to malicious content or phishing pages, indicating a phishing or exploitation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://solee56.com/ckfinder/userfiles/files/10873177705.pdf In PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/29139425622.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608066eb81e17---24863719645.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/70412137365.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/99794798504.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a45e9a999fc---28557572715.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd955dfc6b---6090360354.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/vedizafizuninupodi.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/xozinefewezabez.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/tejegu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da633a879c---pajasoji.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/99143983166.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/pll9j11644km7qrq849l22jql1/12134076164.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/bejugavoxi.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/sigani.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ae5f22307---92574013051.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/fc47c58801af8418a184b1248361b7a9/73837781362.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d2435fa9a---81861944056.pdfIn PDF document text
    • https://afayl.com/userfiles/file/ropizesozelidefuvagus.pdfIn PDF document text
    • https://equinox-e.com/upload/files/gurotilo.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa259151d33---zijodinevowajas.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/7f087029a035bdedc4f9e863c150f124/97003980997.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/og8b3la4ob0sij4iviu0o5d8qn/xapadof.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/67164470662.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e8237114e13f7f9c7c3bf6f620b16cd1/73952449017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+use+a+pendulum+dowsing+chartPDF 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_off00011738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11738 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4A 17496 bytes
SHA-256: e08b69d4bf28f21d4f1c56c27abf2a8cb54e01cf671e8fb5b7197f21fdf723da
font_02_sfnt_off00015cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCA 11140 bytes
SHA-256: 220413aa8809de17e5b7f71a73bb2df1f046d183af28e816e79d3c3ecd09ea99