Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2382f7d5d67b4ae…

MALICIOUS

PDF

96.6 KB Created: 2021-07-19 12:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19f7d126e6a644f5d18a2f51c9f24931 SHA-1: 605aa4929b337dc81b4d01400ac22b52b404a1d0 SHA-256: f2382f7d5d67b4aeefb1755c173f4a5238270a9ac5ad451439556cb3ba83f6b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://klhl.com/userfiles/file/difenobubixu.pdf
    • http://korealabels.com/ckfinder/userfiles/files/todowupejupinovafanudez.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071abf05c393---89466551244.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d33a8a2e855---dimumunonanazitakakaj.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/95325c6edc9d64226314bda181fad071/95494362786.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1904d50bd---nerilev.pdf
    • http://www.saito-ken.jp/userdata/file/66422176259.pdf
    • https://rrr71.ru/upload_picture/57777620436.pdf
    • http://bafiti.com/sklep/userfiles/file/napupusovapu.pdf
    • http://www.findvoters.com/userfiles/file/85089918956.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b5411b09d72---46014340750.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b005cc469---24815200200.pdf
    • http://heureka-cz.eu/files/wetapejewozofit.pdf
    • http://mevlanaasm.com/resimler/files/10757080108.pdf
    • http://ackerviewguesthouse.com/userfiles/file/fowinevabilo.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/523e65330d53a8e12a1df65b3e47a364/lawozeluxubikazagise.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad26285873---74559877883.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/s0tao3n9pji8b8gnn3lriqq0o0/79398023885.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607434bb208f6---98574456869.pdf
    • https://butterfly-propertymanagement.com/userfiles/file/78807104612.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fd614582129fd4b5d84650590ec8a646/89578879838.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac770ebb7---nuvaxusupedivuviluzopu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=demon+slayer+chapters+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070e.bin
1a1c0fa27e829b792fc17eca1c5cace61d44caec558624d362055daaca37e707
pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 23420 bytes
font_01_sfnt_off000142e6.bin
c10904905dd1b90074377676e0c80525833ef968837a1a27980cd086768820ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x142E6 10752 bytes
font_02_sfnt_off00015b7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B7A 16792 bytes