Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2e22cde1f4b583…

MALICIOUS

PDF

83.0 KB Created: 2021-09-23 19:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: aa1e434ee3296e3a87e48813c9ac32e4 SHA-1: 9e23c93b7636d95540e7069825bc2b5751873b31 SHA-256: 9d2e22cde1f4b583c764c0a0cd931c8a2115cf7cd97285f8ed643f430dc099b7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing lure. It contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS upload storage, suggesting an attempt to distribute malicious content or redirect users. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://khyljg.com/uploadfiles/files/sakalibejaveloli.pdf In PDF document text
    • http://www.mediagrand.hu/data/editorfile/84923981672.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kenitemivojupewofuloge.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/keber.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/zuwewuvesisamaresawi.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130a66e703a5---79874743267.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/50209154721.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631569984.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161387d3871c98---38335751989.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/48237435110.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/42255343996.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/xososexadod.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/witibufulabodijez.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/11633293639.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/94828710781.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/60945879234.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/pepejuv.pdfIn PDF document text
    • http://myphamasia.net/upload/files/rokilukirubo.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/84786998245.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148d7daa0acf---33866304765.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/47542700892.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/80989663385.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614be5b27c6a0---sixusolerevezeronuzafew.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/xixamuvopefagadusol.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/nigifikapisufawisajad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=fast+fashion+what+is+itPDF 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_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 18228 bytes
SHA-256: fbfafb7b5f17e49f4a3c822a8cb7d571e8f0d0016493aca25e84c97c3da17274
font_01_sfnt_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AF 10096 bytes
SHA-256: fad910e80e037b58cead8402cddf91416a42c7d7eaec8a55a9bb111511d0264c

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