Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7da8f8ac7196bd8…

MALICIOUS

PDF

72.4 KB Created: 2021-09-25 13:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2fa657736f92498404c0356a9d40cf4d SHA-1: d7ea81aab5bed5c62ae5a1ed46b6bf3de552ce66 SHA-256: e7da8f8ac7196bd8a3d968b03f83e85c6be06c47ebb29e2abb73b53c6b2cb21c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://eventologia.com/userfiles/files/sawiwigedogax.pdf In PDF document text
    • http://imbirimbir.ru/files/zoruseporaxulogiwax.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/55838931162.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/fe3892f67e719fb84218a04afbb75415/dowivukejazebunefegetine.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/95572131551.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/38124229689.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/memawifurogedopulo.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614287a49c6ee---xevozivujirojejabisit.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/depizezufopigawado.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140eba557113---ropozopezoxok.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/31897407616.pdfIn PDF document text
    • http://www.bash.cl/media/file/sikawunoxu.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/20224378756.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/xuveduwuvajuxovuwogasewot.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/22688020960.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/remikudefu.pdfIn PDF document text
    • http://fitviewer.de/files/file/rasezuratejaj.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/goxepufokapexovibe.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/11523513365.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/wewozimituxikomo.pdfIn PDF document text
    • http://saint-party.com/media/file/8348923510.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161395fa1dd150---xevikufezelerofekokewo.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/55295151052.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/zores.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/sesobifagusafesutuporiget.pdfIn PDF document text
    • https://mahae.hu/files/files/doluzukilulupij.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/jefutute.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=123+movies+app+download+for+pcPDF 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_off0000b60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE26 11084 bytes
SHA-256: 5f6b97cd7df4a18a2088485a2bf1f26d7b2113cd7461d23c2e999897d304b78d
font_02_sfnt_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 16368 bytes
SHA-256: 3dcf1c155880851cd3a8d762c572c3672d84ed42a53204373a8ee917fdbc83b5

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