Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed14ead5b2f52cdf…

MALICIOUS

PDF

92.7 KB Created: 2021-07-02 03:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2d16d457be5116f933c2d89300a044e SHA-1: 3fa5a90ce370589e423a900bd90a2ad54afd8d7f SHA-256: ed14ead5b2f52cdf6068db47c055d37d2f65189dcb11e30611b75450a02e9744
96 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of these links indicates an attempt to direct users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/hkucrtem46l9hdtsllhu6fa33j/fosojegirofogexano.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea3431985d---tasekomuxarekires.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b28d84c0e8a---punejepavenutusurubur.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cae9d086cc---xekibexexoto.pdf
    • https://pasarantogeldua.com/contents//files/tofagunimuxulag.pdf
    • http://macabrey-luthier.fr/data/Files/pajimimirunovus.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/cf93208afdd79fdab46dab518c6cc4d7/ruzuxafefudonefajido.pdf
    • http://southport1969.com/clients/861680/File/wodesuw.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-27/20210627122639358729.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/5f0c9adf5c14d807525d6714e4be89e9/49673950867.pdf
    • http://csptech.net/admin/userfiles/file/bikosugozerodekuba.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/68pt03qjn9pti74hreqfrj5lp5/pejulimugolasepuvugiti.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/d91842a95a0730a5f544d51029263849/xogoda.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/7ecfb672bc969d343f7b5e568758161c/bapalekefu.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcce624713f---fidikakazikiniwawojog.pdf
    • http://rafaelokazakov.com/file/seweduz.pdf
    • http://pytextiles.com/userfiles/file/92648122096.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/96511e3c8e450ba28c5e7d01a2d4c473/zebodukitolorodewaxeme.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ca9aeb480---14411431529.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b09a1da7cde---38654105240.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806f2cd71c6---26991583988.pdf
    • http://writtenmail.com/upload_images/file/koriduxulojejida.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/mabemilubowameremen.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=micro+teacup+chihuahua+puppies+for+sale+near+me
    • 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_off000107de.bin
537840216d15a4568e3f7abfcb281bcd5cbad9cf383f35526e5d3d2ef69571eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 10840 bytes
font_01_sfnt_off000120ac.bin
70e167b8ac3b65f0dbc8f2380020fbd5efa77e9c6ee0b8cea6c10740fbe4443b
pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 17156 bytes
font_02_sfnt_off00014d45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D45 16792 bytes