Malicious PDF — malware analysis report

Static analysis result for SHA-256 107c927b1cb78f1f…

MALICIOUS

PDF

91.2 KB Created: 2021-06-28 22:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1edf53acb4d76cb13a8386f202e9ace SHA-1: bca44a50beea68c7af2b45a1f1f84a998eae107f SHA-256: 107c927b1cb78f1f3e106277dfadcc5e2c14918cf6a5a7f1c18f54cbc7111c25
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://minutemen-jrotc.com/clients/84940/File/ludivasemu.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/h6suifumj3neg45fav8a8sbnl4/gibazanodato.pdf
    • https://drticket.ir/basefile/drtiketcom/files/44572767749.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/n607r0nk0b57d1p2hkvplhqcjq/tixosarerokipeva.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/poln45a4j8rrhgunf8pqdsia60/96720026141.pdf
    • http://bet-balance.com/userfiles/file/dagowafaduj.pdf
    • http://anandamsanyal.com/userfiles/file/60266744393.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/e249ac7da78502f8e5f44ce20d7ca016/5808402767.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160903d1bbda51---95367156849.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4e002ef1---6620033429.pdf
    • https://istanajpdua.com/contents//files/kizom.pdf
    • https://kodcomputers.ro/2664/uploads/fovag.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/nua6thj10890vh1hvf87svr5t8/89445980318.pdf
    • https://dintek.eu/uploads/file/77092724340.pdf
    • https://repare-ton-smartphone.com/userfiles/file/fiwowopitekig.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b886313a6---sefoximunixowiber.pdf
    • http://artkulinaria.pl/sites/default/files/file/wemekedovod.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/i6jb0g1i2ojpfh05l9bp0l7ql2/40084778517.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/cbe0452435efa7a3b3c9b3ca4a60b6a6/287616646.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcdefdea4f---filimi.pdf
    • https://avenue102.com/uploads/file/84495737383.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=material+estimate+for+house+construction
    • 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_off0000ff63.bin
74a8008da443cf6cf27d214bddc7d42ad4539b22b82d04314784aed883de6565
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 10692 bytes
font_01_sfnt_off000117b7.bin
e57085f25a40492416c9dfe81be94f67f56ed3a6a7fa6e5b6e6118e2a3a19dff
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 17520 bytes
font_02_sfnt_off000145ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145EC 16792 bytes