Malicious PDF — malware analysis report

Static analysis result for SHA-256 1796651ae1712dd0…

MALICIOUS

PDF

84.6 KB Created: 2021-07-14 03:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e84dcb439b790694f32a495daeede8b0 SHA-1: e2db53be2cc3de939e03fa82bbc6e55aa6052dad SHA-256: 1796651ae1712dd0bebb25848fd7e166eb19baf8b87ac044f2dccbdd3321c5a6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a phishing trojan by ClamAV, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting, likely to distribute further malicious content or phish for credentials. The PDF structure and embedded links are consistent with a spearphishing attachment delivery method.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

Heuristics 5

  • 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
  • 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://soudurelausiere.ca/upload/editor/file/dimulegejoxejolezawor.pdf In PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc373a13c2---wejijunumapasemajowavon.pdfIn PDF document text
    • https://masihpt1.com/contents//files/78136728821.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea0c86a23a---kizukero.pdfIn PDF document text
    • https://areicon.com/images/file/nabodukok.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b84a2650b9---nireti.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/sr8al5cml8hb9u0gs441lgatu6/rojusimixekere.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/bagugejakonokajigubosenu.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90903b590e---sonuwuxubanenefi.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073974deffc4---29458807431.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/75693442685.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/vexiparitisudajeduzinun.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/hnmg2vs0kstvqu9vhc6ouqgedk/fijuvikedaromiduweboval.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5b2f68fea---vovutajurefina.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad225ff3e75---78644363527.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070c66c804e2---zezewepelipulufidezagu.pdfIn PDF document text
    • http://come2menorca.com/images/file/81088091046.pdfIn PDF document text
    • http://yejida.com/userfiles/file/22180316659.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/84916447446.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b5ca5c0098e1e99d0b8895fa0bdb48fc/wupivebonelakibawukulije.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/30194846177.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/62615009010.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ae592a624---resikozirivazufatizedup.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/0ba10361a0095bd344dd43cd98a99bdb/69786910169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=what+happens+in+the+prophase+of+mitosisPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1C 16168 bytes
SHA-256: 720640483b3fbb489a4f4c2a749e11a6b16fd0ae860dde9847a81e110095c322
font_01_sfnt_off000136ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1