Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd997fd9fe26feeb…

MALICIOUS

PDF

84.4 KB Created: 2021-07-07 02:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e887d8ff084903de1e9fb3dd93a7748d SHA-1: ade7d70f0f298d8c0317a01c8a333918394dbeef SHA-256: cd997fd9fe26feebd7b018520a56b501e2445a30bb3212cd0465a955d7130a5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to exploit users via malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://josephlillianmorrisfamily.com/clients/59960/File/87463378634.pdf In PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/8922356886.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084293fb9b3a---97414558546.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/gerogoniwitaje.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/54787709140.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/juzubufonojoneni.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6a2f58c89---jusazugupexetijume.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/nusofopemanotepe.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784ab213892---dadobowejitidavurot.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bedcf6298c2---33776364362.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/jgtdcq7h10fc13r5d86h7uj807/mopubipoj.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/8926ede1fc80b5fe288375b75530880b/56969358257.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/73a46b326078efadc07570b5c94e5413/86941618679.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baea8cc39d9---nukizubupibetarinikif.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d599bb50ed---89549472071.pdfIn PDF document text
    • http://absigorta.com/E/file/garibipovunekagi.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/51bbc9b308fee79084d65dcb26cb756b/kigogewarukefuvizud.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/fulot.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608866e825203---17338686704.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f159482a5---2249843483.pdfIn PDF document text
    • https://soechi.id/userfiles/file/gevaxofuzezetenugowi.pdfIn PDF document text
    • http://srutimusic.org/userfiles/file/59273231776.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/i5aeg042dbeh5k49gklj9rr70m/41468900085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=what+is+the+meaning+of+dtp+in+computerPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 16912 bytes
SHA-256: 486c0d0b6136effcd09bbf7d3b075b53ca45b51dd8a58c15ca34c71917407a0e
font_01_sfnt_off00011286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9D 11112 bytes
SHA-256: 521f8e3dcdaed10b5b3aeee9c48d375046bb1fa9c399d051452fe3b5b4f3c74a

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