Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc14b7ab06b3ca80…

MALICIOUS

PDF

151.0 KB Created: 2021-08-04 18:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8cd5b2fd4a4c7457cef7297965b1c27a SHA-1: d5161ff92309c72f409d2a05a87c112603cdc110 SHA-256: fc14b7ab06b3ca8096fd4a4c0da061407e7bb3028e7b5a4102bfebefd52806f1
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The document body is unreadable, but the heuristic findings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a52dd49be7d---xufufizubevopofezabetebox.pdf In PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160715d8c8a695---mososisasixisikuzip.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/vasosizol.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/vinepagixumisetexalexuga.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/lvov8rcfn3m3bn8neb19rtc0u2/2581345821.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210524171245125.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/673feaae64a2e0775b686a34aeb9413b/titewumusurovogi.pdfIn PDF document text
    • http://hondaototananlongan.com/upload/files/zijikezit.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6d7cbd03c---40881672713.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/74677504e29b8df469891e89d91ec00c/17131936316.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9775ab81d8---fozisojirosi.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796596d433d---zuporutimob.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838266f1696---16839175505.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/62550975613.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/3d540b1fa7087908c5553b3b5944eac0/52657851266.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c44b2d1b16---xapufatumenonevinumezi.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/zugisesapekob.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765b68d4706---86389314749.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc45e17298---dojisonuduzodugulezewam.pdfIn PDF document text
    • http://guchenes.com/d/files/fugigew.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2f454f7fc2d01be6ba1a0093a3608664/17180008927.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/53c5537c0d0a1f48707f8ee6ed1f5806/fuzawokivipatijukuzufi.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/binalelugemogevisen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=basic+of+computer+graphics+mcq+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_off0001ec05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC05 11216 bytes
SHA-256: f00d9849674f409dd91ac0401a0a8a4ceb69453e0ea4adfb5240cc3acd09020c
font_01_sfnt_off000205d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DE7 18472 bytes
SHA-256: 31f78f793899f49994175c0ead02270f4c57786e47e782efbd94fca041fa147b

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