Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea52b5a0609fe80…

MALICIOUS

PDF

81.1 KB Created: 2021-07-15 23:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 875515f792cc263b501ceb420d93d8d4 SHA-1: 1ad59fb5260194a65a82798eedd7797cfad815f2 SHA-256: bea52b5a0609fe809adadc739fe967486e7bb49af467f3ce8e97a386f531428a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous unknown URLs indicates a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a3fcd0d3---2687780795.pdf
    • https://mfdesign.hu/files/file/xakadujej.pdf
    • http://noithatnhapkhaugiasi.com/luutru/files/69339135285.pdf
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c7ddb13d---zonagupibidesosotu.pdf
    • http://www.ferm-matic.fr/upload/file/53199354508.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083969f8f7cd---68022136747.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cdd69527e---kugadebixivuvuxumejodegi.pdf
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/77200689120.pdf
    • http://vce34.ru/attachments/file/dozimeg.pdf
    • https://communeouchamps.fr/userfiles/file/pemirubivonopelivogef.pdf
    • http://alemotta.com/resources/original/file/98188538072.pdf
    • http://bortran.com/upload/image/file/20210513050251.pdf
    • http://builderall.info/userfiles/file/tixeruridupujagewukufozup.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22a748a3419759daaf252b3eae72b9b2/16417782089.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/70738482224.pdf
    • http://dongfangguohua.com/ckfinder/userfiles/files/modevepup.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/6fbhtpkbed8ge72nnet9o6guc3/56916010983.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcd5d0025d---vuserukufurapawi.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/168a7082330fa7304e14c6f1bd340738/sogixelikujugabivenumepu.pdf
    • http://szao-spb.ru/images/news/file/safevuxetejemoweze.pdf
    • http://dentherapia.hu/files/file/xeseluperuz.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/tg9t8f013gj7gnvqfrt1kce5f5/rafozitenalo.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a99631e32a05233e1cf88fb846178e8a/49730194160.pdf
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/60876544675.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/6157b79625ad5f4655b0966e450a2f66/pewabela.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=unc+football+message+board
    • 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_off0000d791.bin
3087666142a3ac92eaf1c5035bbd5f58583d70100d6ba63ef6c243fabc1f96af
pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 17712 bytes
font_01_sfnt_off00010613.bin
bc92a158dd0a9a3bc63b658c79e1d767cf90294c06da6c927cdc952caccd3163
pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 10872 bytes
font_02_sfnt_off00011f06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F06 16792 bytes