Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04964266f6fcf83…

MALICIOUS

PDF

86.9 KB Created: 2021-06-27 19:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53c83faaa48b3b83a54a22e4a12e04b4 SHA-1: f34c645a11c8f01238a8ce702c08dae42ff592fd SHA-256: d04964266f6fcf83734dc41ee5de1e7dea0115099681a6ad76318a8328f3cdcb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or further stages of an attack. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://tnslib.net/userfiles/files/5059406057.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/6da6fa78aba3bdddd96111947578deb7/fakakivavofekideminot.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/64a263a2f2518c3ea724f7a9a0883e47/xajulesukaxenuvo.pdf
    • http://prodottoitalia.eu/userfiles/files/kukerodibije.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a4fe4b2f0---69451108833.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607489aa94e6d---xutavawuxisesi.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d3fd0f759dba65052f5b152d7d8a24b6/94664490460.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/si1j67uge6v03t12j1fdmbkc65/junaduwapanasudipilezob.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db5aadb81---52799074541.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7de72753a2ba6a3515fe1a123472b652/5890199854.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/8fa418ae41b67d7b9432a5565c94c819/sewiginexu.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a47e6741291---lipowonuraxalaruxiletugat.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/624324572a16ea0211dcf597937af63b/vutawobofat.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7d69857c---40959450597.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761b486c2c7---73541035207.pdf
    • https://anmoul.com/userfiles/file/jukesojulorumatorago.pdf
    • http://busankid.com/webfiles/board/file///pipuzeko.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c105d6b722e---kuvaxoboro.pdf
    • https://a2designbg.com/userfiles/file/geromuwuzagibizalupewaja.pdf
    • http://xedaptheduc.net/app/webroot/uploads/files/gozuvalonevalumazawexener.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0a41a164afe4b6ccbffc7ebebeb6dba2/xuwedubetaba.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f5607e57a---guvegon.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c8da96b5---togoga.pdf
    • http://i-harmonics.com/upload/files/rugebonagotelutow.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=amps+over+volts
    • 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_off0000f0d0.bin
d1bcdd2b52b08353001f6786f31ff328ca88a223529613806b87e02c41bff5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 17404 bytes
font_01_sfnt_off00011e86.bin
f1406abab82a1bb2bea5a7ffb3c08c85ecbb3fe0a591ff74ccba191cc5e52897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E86 10104 bytes
font_02_sfnt_off00013520.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13520 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.