Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26e299f2919756f…

MALICIOUS

PDF

68.8 KB Created: 2021-05-15 12:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950f0e646b145c52d2f349cfa12ffa64 SHA-1: ecc52f05bbb2139c3fb8ae225fa410fc029e5c98 SHA-256: c26e299f2919756fa335dfd962983d3c1f8d4f28e49a75a30f114f073f8ab9c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to download further malicious content. The document's content, presented as a 'free employee schedule template', is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc2a38eefc---lumazagalerogofe.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/cfs13tn5oeurtr0j1fm5u3ktov/zikulema.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4f575b54a1c4099b7b715b005634fcae/68103606985.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf3a33264d---metatoforotukoxunezoxibof.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/5b8980189c7822207ffd807c9b80d695/95371335569.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67fa10726---24215071723.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072523a3335b---39755161183.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/97237099928.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/843c90c6b839b1f870bb48caa6a01ddf/puwag.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/ea7oi9he7ntdijiodlp1o3os9h/3318629276.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/32bea64611d22ae494b5da89203ce27d/91879559050.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c5d26093c4bd2a9ddae24a135141413d/11660023163.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5510bfff28cf4fb971fb78fbdc022eb/89738526051.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/s0q1rli67rg152bk4h943n50r7/53924605980.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a7d9e8f7c4c8afb63f2375190c31aef7/73719800989.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=free+employee+schedule+template+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d181.bin
66af4c70e6f8ec5b53562848021f862c0ed8fe9048f3fbcb03bb740b362008e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD181 5452 bytes
font_01_sfnt_off0000e3e8.bin
d19528c4d209617b52097251d86b92a3b37d462043f013161d0a4a729881fb2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 10088 bytes