Malicious PDF — malware analysis report

Static analysis result for SHA-256 74630d06d9817107…

MALICIOUS

PDF

87.0 KB Created: 2021-08-23 13:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5a36e613a7cfadc9a7350f0eb9f21057 SHA-1: 026da2d6e9124c6f51ac0127d7dd7dbb67551a55 SHA-256: 74630d06d9817107caf1bbfb9493ab4426290a8daf6a3bfd606c85796315644f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_MFA_LURE' heuristic indicates the document is designed to trick users into providing sensitive information, such as one-time codes or MFA approvals, consistent with credential harvesting. The presence of numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, further supports a phishing or malicious content delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://carbonelite.ru/file/wasapipososulalujidegi.pdf In PDF document text
    • https://kovtec.pl/eurostyl/photos/file/zaxuwovosagusa.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/xakixawuw.pdfIn PDF document text
    • https://efnnma.org/files/file/laminusutitexazudatezobas.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728eb428e55---21039736269.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/tevolo.pdfIn PDF document text
    • http://www.77ice.com/upload/files/pabewive.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712dc56cee9---derinomof.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/i87qp2qmokcmgi4rrut7kpp9nv/monejefak.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9ae5e502f---xuvisodetufureminuni.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/46623367394.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/99440286981.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/tubajadopik.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e5cca55f1---66463912662.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/17951186470.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/a47c76e5b180742cdf50a11ee5ea40b4/65446436828.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/868442084d6ae26472f0ce2561d2e090/kerajugodukitapaniku.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/nojoji.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/ritukilosazewowe.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/vafema.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/sozawedabi.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/903c662b07ee1f47cd489f3bcc8c341b/diputesezegu.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/nudaxoroxusiwowanewiwo.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5c6417a93---vifekojedasowax.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/84349196058.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/razukijujuvujeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=gift+codes+for+afk+arenaPDF 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_off0000f07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 17096 bytes
SHA-256: 4151e0415260af0f9b7b6c737c6c3efbe8f7ce1b29cfed2c73854b21cbc9bc22
font_01_sfnt_off00011d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001353f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353F 10552 bytes
SHA-256: b5e66096e6964c9ea933a90df62fb12a6009cc287fc89c95d5280fc4b8f84018

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