Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0f75c963af800f…

MALICIOUS

PDF

75.8 KB Created: 2021-09-06 02:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 89669bc9cf314832096ed9527c4491cb SHA-1: 7afb34632d1e24d234bb451c2885f2df92ba2773 SHA-256: 5a0f75c963af800f2f6add49234486daa583bfd698e91cc0fa1b75ddefd08ba4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm directing to numerous URLs, many of which are hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://limobebe.com/userfiles/files/mavuped.pdf In PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/d64e75e41b3d13251df04f09ca2d55d5/xagaw.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/faretobukifexakuxusixi.pdfIn PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/bonawigebuguzigajikov.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ed9459d2e---wuroxavikasag.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/38890501729.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/xodagojimurifafekojovo.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/zojewavorezujirikezisixab.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e22a4a40b---xawudogaxuv.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/68245384043.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2fe84796a---95337626478.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/19442237393.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/93567216733.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lj0gm8epqqm9nfrgjuo76qld20/97224734241.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c3b464e3---sejikixizoban.pdfIn PDF document text
    • http://mfahk.com/upload/files/3971590352.pdfIn PDF document text
    • http://montesantangelo.it/files/files/65665464389.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31a8bc6e11---gamifiwugetexe.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/73651428517.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/j29752s729qamu4carerd0ki4r/37159763838.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/31227949217.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c5b746a2a---21153742420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=production+possibilities+curves+scarcity+trade+offs+and+opportunity+costs+worksheetPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A6 16832 bytes
SHA-256: 4bc4ec9c8c5d58a7f73f4e1e19b6bcbbd3ee72a79da458765c19d23e1708c96a
font_01_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 11316 bytes
SHA-256: fae7b609d59ad12d07a8b8811afa18dbfc6ed56e98a1699f910b48fd183d7b7b

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