Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceae67396976558a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-17 23:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcb8370b57c018a730e8cc32d72f7156 SHA-1: 5085bf60a3705d796abc5300162bd745ccd295d2 SHA-256: ceae67396976558aa86e308bd550618d16884d5aff4796f3f78b50cbdb44253a
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, 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. The presence of callback lure heuristics further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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.
  • 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://coretry.ru/uplcv?utm_term=what+did+george+washington+like+to+do
    • http://manuale.aziendasulweb.it/userfiles/files/sadewuwokox.pdf
    • https://radekslodkiewicz.pl/files/file/xevasetoxususikakef.pdf
    • http://luchetti.it/userfiles/files/munomajepiwiluf.pdf
    • http://avvocato-callegaro.it/public/file/20681530703.pdf
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/xoredegubelonivagonadan.pdf
    • https://mmszke.hu/files/file/podewefibi.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613521a9dbfb8---dazusijogufimaxovosiz.pdf
    • http://audidalys.lt/ckfinder/userfiles/files/gosoreferowexofakilerun.pdf
    • https://tedvandergulik.nl/userimages/file/30254413069.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/u0enm712j6746n70e6f5kjfhol/15407085691.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613731ccd87a5---42480782981.pdf
    • http://niktid.ru/userfiles/file/39821224710.pdf
    • https://sportuna.be/ckfinder/userfiles/files/2025095778.pdf
    • http://prodottoitalia.eu/userfiles/files/35008337464.pdf
    • https://perfumes.dropship-tracking.com/userfiles/files/88745329764.pdf
    • https://thuaphatlaihoanghuy.com/uploads/files/taxarosediwunamivuzodesi.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161346729edc29---xabunusigijiruwepopep.pdf
    • https://kitapkaplama.com/upload/ckfinder/files/94351006551.pdf
    • http://cmuniontravel.com/userfiles/files/popeporesigumogasi.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/fc1sunir646jtdunof5g43eja8/giravewolapatiwipet.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/dusiku.pdf
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/1194074107.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/33iva96fbnoqubiiuq9odb77hj/67034208665.pdf
    • https://ntct-dz.com/ckfinder/userfiles/files/68932916880.pdf
    • https://cleartunemonitors.com/ckfinder/userfiles/files/fiwugewepefusemuliguneja.pdf
    • 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_off0000ba32.bin
acdefa8681f6c48710765aa828235bee098528bbdce96c40685f0fd34ae748c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 17696 bytes
font_01_sfnt_off0000e883.bin
5def572570c0945b740939862230ec887da686b886443e05cd4fa0d58a0cdb88
pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 10696 bytes
font_02_sfnt_off000100d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 16792 bytes