Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bccd0f853c4194d…

MALICIOUS

PDF

86.4 KB Created: 2021-09-06 03:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0b26dd65e95b2cad861b22062038f880 SHA-1: 631cce431b3d16717968e78d1ad018a980b8f5d2 SHA-256: 0bccd0f853c4194d6d82a0ac3e766c62d89662f05ea4f814413fcd92fba75546
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing lure. The document contains a link farm pointing to compromised WordPress sites and disposable domains, designed to trick users into downloading further malicious content. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://specimport.by/files/files/sogaxugizaxes.pdf In PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/sufiraxig.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e342bdb1---211691035.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/sakamuf.pdfIn PDF document text
    • http://congtyvima.com/images/Download/5348052849.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160858465b38c4---12296342656.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/17058860652.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/73650425232.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70e888da24---potamunawuxuvenifo.pdfIn PDF document text
    • http://phsbulldogs1966.com/clients/8/87/87911cb64b10f66d93d15f7b6e22d365/File/litelelurugazogojurusirat.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/17246960095.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/tavezolinonudiwufunefuta.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/iin6jiicvm6tl2te7h697afah5/51906732141.pdfIn PDF document text
    • http://xn--22c6buakeib3ax0bzcc5b8tlc.com/userfiles/file/konupemarezebokawurojuxub.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a343eecf1d3---79898834300.pdfIn PDF document text
    • http://le383.com/uploads/files/vawurag.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119d4d98b137---96462528240.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76fbe13c3b---81000049867.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/zujit.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a254d52777f---77209314796.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/tifelepelojazunironilatot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=world+english+3+second+edition+teacher%27s+book+pdfPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 16164 bytes
SHA-256: d7da5801168055627cb676c8436c5c866750233ea4b9482c0e601307330bf0b5
font_02_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 24060 bytes
SHA-256: 6123717e99472d7e9829370c8788cadb44d436c0d1408e6f5b0b2c42525732a0
font_03_sfnt_off00012769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12769 11332 bytes
SHA-256: 847069391b6a09287c011cf47da59333086809fcb08daf87bf1f23f860c7e00b
font_04_sfnt_off0001419b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419B 1840 bytes
SHA-256: e11639021ae82bc81d66597892112dbefd7f2cb67f426bbebb6fc3c29591e729

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