Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6ab01c1748df5f…

MALICIOUS

PDF

154.6 KB Created: 2021-07-06 14:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d33568dd89df4accd96caa5058625c95 SHA-1: e1b7b1a821e54d3161f56dea0baaf8ca7c8d4eca SHA-256: bc6ab01c1748df5f5d4119c350ab2419d7dd093f3dd154d3d92eb00110deb4b8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The PDF structure itself does not contain executable scripts, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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://allytemp.ru/uplcv?utm_term=meaning+of+the+name+lilith
    • http://szpital-sulecin.pl/images/fckfiles/file/77008944.pdf
    • http://wksx.top/images/userfiles/file/katexuxoko.pdf
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/19024071282.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9dac477f---19231228299.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608eac29c9205---sefedafutuxodemoxi.pdf
    • http://gramercygrand.ru/files/file/60305377143.pdf
    • http://andrelandberg.com/userfiles/file/59397753548.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/4d66fe749ae7bad5f6fe3ff01f58f594/18993042068.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/40102932774.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/0cad60fd977d15918cab64f450fe5784/jexevomazetelizadugi.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/bccd731ec77d9293c4d413414ac03926/xibiwo.pdf
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/65536693148.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608be64c74678---42446667698.pdf
    • https://lexconsulting.ro/webroot/files/media/45536110956.pdf
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dhf73v9vqdiahipcvr130ucf3/poxigilizujutazaze.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/e36c20a811b84b41712e2633a7591786/17131193464.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd49c61194---1628449771.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/xipimawa.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b72eda1ca3---melufemefajasekepup.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809b3dd2dad---23398185093.pdf
    • http://rogersdesignhouse.com/uploads/files/62109490929.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160877924b24c9---ginagi.pdf
    • https://habibitoursegypt.com/ckfinder/userfiles/files/52747487077.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc30e472e---nagexixiza.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00022074.bin
ec0040cbe32f98d4a73e6f5b710c0972aa1a968bd93ab37983dd51e8003a0d0b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22074 20496 bytes
font_00_sfnt_off0001cd97.bin
10c1e0446db315f2433874fb6c7c3f853d11df60adf24b898e76a796cd4fa673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD97 24444 bytes
font_01_sfnt_off00020863.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20863 16792 bytes
font_03_sfnt_off0002455b.bin
4a3e2ae9119a80c3cc4ea1bad71c439ca1829a05f8a9ac5d4d32df2329f22320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2455B 10388 bytes

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