Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2267ab707248ec…

MALICIOUS

PDF

83.3 KB Created: 2021-07-02 11:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92ce19a19ef0a1ba540e8c345bb13029 SHA-1: 9705914bb52857778588770e3a5c4ac4b68d28ce SHA-256: cb2267ab707248ecfdcce7b94fbe38fceb18fdf3c21007fe44cbae6a89b45042
184 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 with high confidence. It contains multiple links to potentially compromised WordPress sites, suggesting it's part of a phishing campaign designed to trick users into downloading malware. The presence of a download button lure and a callback lure further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/459b0133ddeb8796b861f3fd00e47b44/76432423869.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4485a8f202---donobumu.pdf
    • https://butterfly-propertymanagement.com/userfiles/file/sezerog.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081eee0e1a47---keloferotav.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cd799a83ae9---47021372123.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a8502ef77---rivubujupujejerabubuwap.pdf
    • https://mokhalasati.com/userfiles/files/mojijeselubomujumipe.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/846e34cc8de0426dc9b6f67b9731ea6d/26722471127.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091dc69be0f0---31599392507.pdf
    • http://gd-weimi.com/upfolder/e/files/20210623080416.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ff03937a230d721bc76c7d313f81ab86/kimabibevemaxe.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/qdfednous9ebd5fkg7um9pdlq0/54814614974.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9451072b5---taludo.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077093eb4906---gilesiropanexibugofiz.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b8a9e15b966db0ba6967ed66f5e7bb4f/49586783482.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/369u26fl4gi94jq90b0mll188v/73774241531.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a7174591---79181046309.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/d29jj91md2vhi870f3t5pe5573/zizedudefitonojisexokadom.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/be2560c321ad02b3c3a693cbd228ca70/webuxurawazibifanixof.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5866b6e21d---78497645508.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607248e3f3375---90978813978.pdf
    • https://stancijanegrin.com/UserFiles/files/44528920244.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6b145628ae6975b4c0582474c5d0adef/mimimirefufu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=marion+county+court+docket
    • 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_off0000e2a7.bin
db787feef1e2bd16f2c41cc5c6fec612af12e6d0d94221459a17a6b52ddb2c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 10448 bytes
font_01_sfnt_off0000fa87.bin
af6169305b2cef6e3f342077e7d7962f50830174df9503650b4043e230b60f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 17512 bytes
font_02_sfnt_off000127f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F0 16792 bytes

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