Malicious PDF — malware analysis report

Static analysis result for SHA-256 799784218562268e…

MALICIOUS

PDF

81.3 KB Created: 2021-08-19 21:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d1b43f0c30c09560c5544a29ca2a4a4 SHA-1: 30f12f7a08f23652109e8ddfa75d01ed067125d0 SHA-256: 799784218562268ed0035ccef1db95d4df832e4266c14bc54570b75d3ce576a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed736b6132---jububeraxajidima.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d8f120910---musuni.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/93674845557.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/f6ecb5d4c9cac0e18870080255e6648f/detogujupi.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/budifipuvafipobojozezeva.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/604eff9add9ae1aea37bcb8a232e1ee0/19247302831.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/dabajijivase.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/140153248033.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160814e2d131dc---kekuxejaxemaligitupinuk.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/26036316781.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/a860004201b4971e19c8846be9015e8c/86798108179.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/talixenozeneguxemire.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/36e39c8a16cbe1b82fd2bade37c4d733/68323444937.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/domiwitok.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/zomavutus.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/74314517049.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a52a45520---18850153813.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/59934502689.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/vikewerikamukamogoge.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/86c5c9eb511148e4d44b6a9904168119/95508905032.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/85781527679.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611add25dae43---kibesetarulaxusipi.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a1df313fbdf---lifelevomesitolije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+legend+of+heroes+trails+of+cold+steel+cooking+guidePDF 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_off0000d911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 17328 bytes
SHA-256: f3f4333f6732efab891b699677aedcbe4b0345f6e54be233d6b89027bdf01c4e
font_02_sfnt_off00011e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E26 10908 bytes
SHA-256: a5f1540394d77434d00d2deda18d3858dd77598711c7f9888fd2627d761c64b2

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