Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c0e7d85ccac24b…

MALICIOUS

PDF

89.4 KB Created: 2021-06-30 01:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b761373e0b9e0dbd2cf6d9c7438d39ef SHA-1: 0548b025e7cc02a062893967f8cd4ffd36cde8f0 SHA-256: e2c0e7d85ccac24beb604c5baa259a60b928cecf8251243e8381dd76acb3fed3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojanized PDF. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further supports a phishing or tracking motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cructi.ru/uplcv?utm_term=ps+plus+may+21
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d33dd6f5---lovikinefifi.pdf
    • http://wildpflanzen-planung.de/file/gozusurafodakil.pdf
    • http://dainichiji.com/upload_ckr/files/12309432890.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160927dff7edf5---55154834148.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/sawuresirazezuvuvevixe.pdf
    • https://x-software.cz/data/file/vomiwoxokalixepog.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/os2n9qe3ti75fjriphsn9vu6e1/wawegemafejumewokoziwip.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5e89f9da5c20e6850ef2f68fb87845bd/73395399930.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607a81d5b879a---darizugivowubu.pdf
    • http://cattaneoarchitetti.it/userfiles/files/2620487394.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/mekoxu.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2a629790ad370e9b8105c0b62eda83ec/lowiropudibob.pdf
    • http://onlinetradeshow.ir/uploads/files/46652963443.pdf
    • http://gioiacompany.net/images/upload/file/70344980842.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075160776e49---45109708060.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/932a25207a93759e1af914ef434e17c6/29259334737.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c85a3daa45a---belofaduxaw.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d17c6af98---fajarafutazow.pdf
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/lepal.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/dsgag3lfhb8tf2hom3c3c6f7l4/zosoxalivunupa.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/d0ab843e816b52f623023f5a6bd77f02/gibotimafupa.pdf
    • https://nslogisticservice.com/userfiles/files/vedona.pdf
    • https://smartmedia.ro/app/webroot/files/userfiles/files/12705683939.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1debc4743d---nigutawal.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/25c7417793800ef829ace4c7075bbc7e/bonipifofoz.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_off0000eedc.bin
e817a14786633f79f189eb0b21247c99e807fe7d58b6558ec53de176754899b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 10156 bytes
font_01_sfnt_off000105b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 16792 bytes
font_02_sfnt_off00011dc9.bin
60178c2ba0f4ed48aa79d6040a0c529eb91aee596fe31ea263e4569ffc56181d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC9 27580 bytes