Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dace60f4bbc300…

MALICIOUS

PDF

90.1 KB Created: 2021-09-03 04:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f7769815e61a5759342600afe5e0d9e0 SHA-1: 466497a5003a589dc396fcf8222baa800dbc1039 SHA-256: 14dace60f4bbc3003b569a9df059fab926f2b0ee4c2f78f8bb18821bb504e27c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to external sites for further exploitation or phishing. The presence of link farms on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/v5o4svk8vb7vrnucna3kdsdq92/gavodiwibujuzisu.pdf In PDF document text
    • http://medicaldistri.com/ckfinder_files/files/12268026831.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608efe7ed10f9---48464964633.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/83539607792.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/domasotaja.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/hmjueoi1peh3rhj8lervpi01b8/wobanilelefujubul.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/8e3e819e210ff8801938b3f467b7d7aa/15786136703.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210723_8AEB951DFB6975D0.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc624c621b6---pudupulajevuvi.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/dedukameru.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/26em7bmf9hhtosp3p6ggktvai1/18610141563.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7f274285---46140329410.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e833086fbaa---puronum.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/migalozubavalunal.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905e84d0ce0---14429198507.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/8229420151.pdfIn PDF document text
    • https://basisangka.com/contents/files/jujagotixafit.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/83503531012.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9bfdeb548---31511913779.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/73934734710.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/ribunesorajexotineniruvi.pdfIn PDF document text
    • http://yogasol.cz/ckfinder/userfiles/files/8388124543.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/tarovibivobadovipifujigi.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607247432303c---lexovoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=sistema+urinario+aves+pdfPDF 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_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 19956 bytes
SHA-256: ce928dd56dc83d38af75186fd1e1492aef9525d5661101f420d9a5b5585c2b13
font_02_sfnt_off00014181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14181 10852 bytes
SHA-256: a133e2c11d28a695f035db7f06ab7b498b9587421f4b383e070f53e553d50d99