Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c495bf38b39d1b…

MALICIOUS

PDF

86.3 KB Created: 2021-07-08 09:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 050387dbfde90f6c3cedab13880310ae SHA-1: f1b10ff9f0ad3d0212eb03f3d4017422fd78dc86 SHA-256: 34c495bf38b39d1b52dc1da25a6484dd72d72c352bb88d6dbea909823da83ddb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's designed to host and distribute further malicious content. The presence of a 'download' button lure reinforces the intent to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • 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 http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f53a16a7ea---fuxawisavij.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5k2apvc8h44ae7bdpb2i20emt6/tavepeso.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f51370ace---80008955341.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b01ba06b27e---79907996818.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53a7512b5a---76950118978.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf2e1ca64---22479666089.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160942099af5bb---62224163411.pdf
    • https://inverpalmas.site/aym_image/files/88213405773.pdf
    • http://suamayin.biz/userfiles/file/98026131371.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928d5dee0bf---zutukisi.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27a5d8ade---19231046664.pdf
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/66458801049.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/f3c957098e9c0b7e8a7cd51058177a95/jadosejixe.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/988a90jm5gcngd2dr4okkeu546/parefatasojopu.pdf
    • http://cauthinh.com/luutru/files/fisurewemuvev.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/db64bb91feecda7605249607277bbce7/nozumekoxelozipowiz.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/44emelgrakk0lekmekn0futle0/ridokupezuroxuguberem.pdf
    • http://bandenplaats.nl/cmsimages/file/dakagobitivesowadive.pdf
    • http://dreamcatcherltd.com/userfiles/file/56393782285.pdf
    • http://gospelinamerica.com/clients/874377/File/wowutalorawige.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/358aacab4e018e62aeadae5914437cf9/49046274661.pdf
    • https://infoenergie-loire.org/userfiles/file/zivoges.pdf
    • http://panteres.com/files/files/benomupipogiwepep.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bfd3429d4---pinetum.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab62fed8b9e---mitosexiwawelibajopo.pdf
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/45424052519.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/68771502586.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=study+material+for+ccc
    • 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_off0000ee23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 16792 bytes
font_01_sfnt_off0001063a.bin
8c31b452d1ed9b7343aa55e343eb79ff1dc297ee8388cf3dac5a64eb6e0dba78
pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 10656 bytes
font_02_sfnt_off00011eb1.bin
0f9e50e031bc21c3577ab3d832c980a9c05b0694ff637df4bb1dd854ec67c818
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 17292 bytes