Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09131bc1407de26…

MALICIOUS

PDF

90.9 KB Created: 2021-07-07 19:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a5fb11d85962d3a5d39f3bb8f6b1145 SHA-1: a8a85ad2d30f51ea554dc54e449ed7d278ecb2a5 SHA-256: e09131bc1407de269b4738b004015797a4a55dfe94dccf1d04277db732b0fe8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://irlanc.ru/uplcv?utm_term=example+of+ore
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160782c092c11e---37201003722.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0bb9056f708dc393e981073930b29ab3/lefobekuvebararalubepenaw.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c7d70f809297052a24defa34f0bf074b/61790263905.pdf
    • https://zlato-eu.cz/upload/files/8923648668.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b7de242bc---gonilefiwanuzizat.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/291917b5ba6e36eb61e6c91656672f7c/91454955029.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0db492609b---71339379755.pdf
    • https://amd-export.com/site/upload/file/napexet.pdf
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/xenugajilosatuzu.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091dc69be0f0---31599392507.pdf
    • http://www.pattyn360.com/upload/forum/files/98890190360.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/62d08bc9f0d33c73d7e43160fe50e409/96950213488.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9d2129cc---48488441675.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e1175d2b081b7efcbffcf5577a16681c/jigoxumalevi.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/42f0d3ae3ae4b34bbb38fe372c6c39cc/jedemukelebatiriziti.pdf
    • http://aep-tc.com/cache/fck_files/file/vogowutolemavosor.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/87b78af68f89df709d6ae378116ba3d8/56012847443.pdf
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/kidapisuwem.pdf
    • https://folklorebridge.eu/uploads/pictures/files/3013223430.pdf
    • http://adamlegal.com/userfiles/file/kesimilemotopezozigav.pdf
    • http://agendatourvietnam.com/hinhanh/file/dakakeneriragimirawo.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df505385357---nasanutijijuxizaj.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/jhg55oq06n90lpdfcupe6p07a5/88626737215.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_off0000ff4f.bin
97b85e91b4949edb026417097e74881f026632bc508a27ba04b0f40b52daa3a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 17920 bytes
font_01_sfnt_off00012e96.bin
1ae3c281997b3e90a6e34b0823381ca14ba39d4ca2861d91c8bcd9fe270584ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E96 10144 bytes
font_02_sfnt_off00014541.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14541 16792 bytes