Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a701e41c97eca4…

MALICIOUS

PDF

143.4 KB Created: 2021-07-19 12:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1810755159c195379046cb822cd95098 SHA-1: e6bfbea98fbb41c04ab1f70087322d965c74d602 SHA-256: 58a701e41c97eca41ee86c0f10d5171457b82ced40d615b1e9c66cd9187c908b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further indicates a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://strandedtattoo.net/file/babazikijoduveroxaful.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4cc2bc833b17f1ca98caa40f943f585b/movulibarax.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a72f1c209---51860897957.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fa4ee6f52---bifakos.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c45dcf36b---5753060784.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ded0871ec14---sukomigirejixefopelex.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/5c3b9c8565e16f62104e0c218cf21ab7/74963811583.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/baf1ked29rp1ihbepn6g7ceng0/25341888354.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19a6b4657---82702639951.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e1c04db0d88681126e8c6c1f655d42fe/19793141438.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zimajulawiw.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2a0ecabcfe4d0e8c44cc787010dbdd23/rogetolu.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f113cccc2---wigafopotigik.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/je0akodqvfotj4vnrd34rle782/zakemadojivipuli.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3131e809e---vejotesenegosara.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/k0k14qg1574cq7gm1nht3k8nfs/wovorogelapurisegemel.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/zobiwixoxosif.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/wifatitisalile.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/gchbekr2v5k0bls00csbl95dnv/ragimakisafanatejok.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/35424e61e83894b9021196f63508ee47/24552937376.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/11680386675.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/hv4aakeqbo79oelbnv324lrla5/rupameborenesakitokub.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/0nqgs42eo1rvp93mt8fqo938td/10297797465.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/6f1d23995e79652a8fc4530acf769efb/lonat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=golds+gym+treadmill+410+troubleshootingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19B 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0001c713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C713 20260 bytes
SHA-256: c5f829a17c2e4e44ba8c39b91830756de3d6e075d6f1b171856bc6848ed7ee2a
font_02_sfnt_off0001fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCB1 11340 bytes
SHA-256: c6d38d05f5c569df0795aab10e5dbebfd8cbaac034f9b0027bb328fa56687cc8
font_03_sfnt_off0002170e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2170E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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