Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e2d102e3ea7370…

MALICIOUS

PDF

85.0 KB Created: 2021-07-07 17:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0c4bc9c5db9128ace88bd2bbf86ab5a SHA-1: 5bcd76a4602d7098fa745c5964baf4603f043c1c SHA-256: 48e2d102e3ea73705b11b5d7a9edeb689c8f2b7ec10ab4f32290160f8778223e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics further supports the malicious intent of directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=room+occupancy+meaning
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6789bb391---jafezekasozinuwavib.pdf
    • http://qianxish.com/ckfind_image/files/27305652662.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7506baa09a---kesamimezegavuwinibulub.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/fbvtsc2de37pc4ic6pbfkqbg4a/wizamelevuge.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/9121993057.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/23a02456baaf1e6396d0269b97f52daa/91649505028.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607937ac1c50d---gusamo.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/3c16501474394d7583ef31c3ceb50b64/guxetifijisiguw.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/blsku5pn66pa13g3jku70n0psn/95586031006.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072069c44fa0---xarasabipawevonerujato.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/9dfd56d43d2bd77deef51ecb5f93182c/6866418177.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/fa7tteshcqoug9k603c1ga8oia/fadekoxinepuvoxofokutebaf.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4599124be---49431462403.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719d8070cef---jatexebojubigas.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bbce5bfec---matedatebu.pdf
    • http://ctkupavna.ru/upload/file/lajumilirukuzafiwujijak.pdf
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/75489917218.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d3454f7ebe5466375c7ea80e78d78e6/laginorenodod.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9388701c0---lunasupolefunenenekixo.pdf
    • http://a-kamen.com/userfiles/file/koranimabajezoze.pdf
    • http://eltonltd.ru/sites/default/files/uploads/kobezoxusawafosuvexad.pdf
    • https://pass-eco-energies.com/ckfinder/userfiles/files/mavavixadobulogafuj.pdf
    • https://tolgyesvolgy.hu/userfiles/file/69188440284.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d0ee4196---78877113680.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fd4c433f4---nitaxegokubawelo.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_off0000e5a6.bin
e066ed8d7d57b6cb9bb1dc056b1723ae49e7029e389ceeec76d0977f5fc2c70d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 10564 bytes
font_01_sfnt_off0000fdbe.bin
ea9687ab5702f9bcdc14fc8e8546a6d23819d3ff1ce39f218c44ffa7e09868c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 18628 bytes
font_02_sfnt_off00012ebc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBC 16792 bytes

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