Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f176d7c25a2d05…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 09:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0596221e8a6d7c988a750fefa59b348d SHA-1: 2164b78429211b2914bd8d721461fbad517a279b SHA-256: c2f176d7c25a2d05b7744f5c801a97cb229a6c13c0067e3c4fb3638d62d3b146
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://pixomot.ru/uplcv?utm_term=the+alchemy+of+happiness+pdf+free+download
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e38de7ca36---zajiruzawunewavusolu.pdf
    • http://timandlor.com/userfiles/file/3978495033.pdf
    • https://asmitahrgroup.com/ckfinder/userfiles/files/dutipakevojojaxezevezun.pdf
    • http://oroblupiscine.it/userfiles/files/64642410557.pdf
    • http://bellina.pl/userfiles/file/22527690965.pdf
    • http://www.companyforte.com/imagenes/editor/file/febenorapeloduvefapanit.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b32213739---41266770792.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/82891673026.pdf
    • http://nj-rshb.com/v15/Upload/file/20219161720372448.pdf
    • https://baigiangtoanhoc.com/upload/files/23560484848.pdf
    • http://cleanking.net/userData/board/file/fefebi.pdf
    • https://letstravelforacause.com/miet/assets/files/retopixike.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142bc336f4c9---52810083987.pdf
    • https://deesudcoolingtower.com/userfiles/file/36720900971.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/37804e960bd045406e360005fa903895/sugonebikupasiweda.pdf
    • http://tataservice.it/userfiles/file/gedovoxuru.pdf
    • http://kechengchem.com/upload/files/85999456112.pdf
    • http://orlickachata.cz/files/files/94934608623.pdf
    • http://mlsy.cz/images/file/files/lezos.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/99585635028.pdf
    • http://alwaysshine.com/fileimage/file/rusatikes.pdf
    • http://portamarioarchitetto.eu/userfiles/files/57751924655.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613df5d7066d7---1032452506.pdf
    • http://hanleyresources.com/images/bofupewojigojinimu.pdf
    • http://epodhajska.eu/UserFiles/File/28642607665.pdf
    • https://tspinstruments.com/cache/fck_files/file/wawigofatoxojunidepepobaw.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140127c50254---71467030468.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabb.bin
2a8e4457d43fda091f878fa5c6913f0d943c133d19364eb2d4b56633dc850b05
pdf-font-stream PDF embedded font (sfnt) at offset 0xDABB 10948 bytes
font_01_sfnt_off0000f3ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16792 bytes
font_02_sfnt_off00010c00.bin
8b8a6ea160c29dba7c5abc9282fb8a9c77f2aaa7bb4630b840d6e0eaeb0f915c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 17988 bytes