Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b11e10b0af1041…

MALICIOUS

PDF

88.0 KB Created: 2021-09-08 03:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e9847903f619e149bacbb596d1ea211d SHA-1: 87ec44a017203740581192aa77ae557da2c70700 SHA-256: c1b11e10b0af1041e2de053b81206449c7544450ea1567c7246f9055069a529f
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a large number of external URIs, many pointing to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further payloads. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=toyota+rav4+2016+manual+transmission PDF link annotation
    • https://www.nitdgp.ac.in/uploads/userfiles/files/bepagezofa.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/7089924507a602ba38e698d72b4fd8d6/3692006786.pdfIn PDF document text
    • http://benrassam.com/uploads/files/85540921966.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b8bac8bb357ee70d2206df3effcc300e/14313821734.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/mobizebe.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/regideleneluviredumiwi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c8995b201a393fe4733abdca2a6b9a3b/rizoduwugovavokemuxun.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/turovifaxegowafedawofewiz.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/sopopinufuwevifoxikeveb.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/buwepiz.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/fapoxixivuxurarenekifutok.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/sovopuwimilisalagivawu.pdfIn PDF document text
    • http://khocabien.com/uploads/files/77545929641.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11ca092170---rewawavejenidutibigin.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844bbb7a1a7---13417188626.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8561bc4ef---manadilavope.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/98240894251.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/jovugojoxiv.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c17e9fe6d71---damawifuzowopasisoji.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/ledizotunazesokiwimavogog.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/72932196603.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 18292 bytes
SHA-256: fa395b70c122e0b5af1277a05673544acdebc74b082958b5e9665f7bfa2755c9
font_01_sfnt_off000120ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120ED 10920 bytes
SHA-256: 2b45a8879907bde208bc3455642b701f127cd109f8fc2f2b3df865048c655fb4
font_02_sfnt_off00013a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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