Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a698a0732994f6b…

MALICIOUS

PDF

83.2 KB Created: 2021-07-02 14:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0606579fe2bb809315db3911508fc47d SHA-1: a0c576d13ea8a131cc0357efe5c10767512e9143 SHA-256: 6a698a0732994f6b4f01dae5b16f8c091522454a1726a7d558e148fe77330a63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=symbol+for+house PDF link annotation
    • https://mattress-leader.com/media/gubabexotikaxo.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/3279190862.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160747d581e2bd---puzajiwofojanaladigib.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/sijukorevowowotoj.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/78aa6c8dfde82a55ccbae357713448b8/90385685280.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/3ce7e4011056c2af7cabd3729bfc8b4f/besuzokepix.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/sapag.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/76068454369.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/42ol4q2r7qb8tqd03brj0khvho/26673577542.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6ccd8264---nidenogurajeko.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/75544291936.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/73522962428.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/d5l9mqda0bh79p0g7hseao7jjl/20828007784.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/68511999179.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/e14fe3e9f630eeabd0bce5308d3c2c62/23726541378.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/7n10a7e0pmt4b005003dgpjrh6/manugedu.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/8245b037c1694ab04d56b1d11b7334ee/1255664870.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4f3ea2d915223eeb8fd99c402be8e70d/bazalufoluzozepulidosoja.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/68422657843.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c7f0c6281---vavuzo.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/73810898484.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/palowajaje.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2791ec45fb---govojanovubu.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 10452 bytes
SHA-256: 4b98b3f5e63fb3d6d70927ccfd09283f61b1f6428763b7d1c2a9b451be1fd2ed
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 17920 bytes
SHA-256: 65bcadeeeb6f48ecce3e3cfc31f04026670736c98752d840fd2c45409a2a2901
font_02_sfnt_off000127aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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