Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ea1b961a0d6419…

MALICIOUS

PDF

72.1 KB Created: 2021-08-13 11:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 90c32417d5d231e1dea80d3dd7d83161 SHA-1: 02cbb19f06e8bf9c97003a5b34305bc56b54c0ea SHA-256: e6ea1b961a0d6419be84fad71e8d96264a7f1ffcaba329595182d592ea1fa785
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload directories. This suggests the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=blood+type+b%2B+food+list+in+amharic PDF link annotation
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c4de401d---fixisavemi.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/funaru.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/8a4ec5f76bbb2efc0621732138988705/xepexopotebidik.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/wutubagabozugewavago.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/tonogezejewelavi.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/hpjsq3eur5ogqpo6bl9ur0ho4u/foxuborire.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/nojeniguzenep.pdfIn PDF document text
    • http://szwygs.com/upload/17673022606.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16085622a7684f---20295376625.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/dqigoiq3rh08knbevs2heok322/fudigasirafugosu.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1a94bddf8b812078ad128b74e162b47c/livujasepoberi.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/4cafcdf66d44a9a5c35a395917cb182c/96052632134.pdfIn PDF document text
    • http://balone.net/_upload/file///tideva.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/64340037784.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ca3ca3b36---giguxalafewax.pdfIn PDF document text
    • https://ivanamihic.com//files/8098013044.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/50075896182.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/debawemapafinolimejejegem.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55d87bdc6---38333972963.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/5080427302.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b354eafee0---kajoz.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/2c7d1b195e9bdf91b14eb49d736bbe48/64754318390.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/gurabobibujanajenutoriro.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/71690967406.pdfIn PDF document text
    • 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_off0000bac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC6 11192 bytes
SHA-256: a9dfb8024a06fcb46e6bdd0ddfeae1a61fecb3f0e66ee2482ad5e8ca367f2861
font_01_sfnt_off0000d496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD496 14732 bytes
SHA-256: 4c5e67fd24444b98f5647f983c7a7b0ccf21e46fec5d070c8b16abdbbedf0471
font_02_sfnt_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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