Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1511d00e81d886e…

MALICIOUS

PDF

89.7 KB Created: 2021-07-22 09:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8fbcfcde35991b16bdbf56be1e416907 SHA-1: 644483cd5d7fbe00f406eae487650676ea354edc SHA-256: d1511d00e81d886e6998749d1d643366818d552f07de03f3942e73509f971426
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content. While no scripts were directly extracted, the nature of the URLs and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d8bc00eee---gulutifobofonusawig.pdf In PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/812f56bad10b67d9fc4db0707381150a/kibesawowegigobunenas.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/nasitowivar.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e1b55ca9e0a8a5f14a0a9bad1e2ada42/78016371317.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be40cd21f2e---xemisuvo.pdfIn PDF document text
    • http://dhf-china.com/d/files/73971540509.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/48408423592.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/19/file/20210519_153247_124.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160776e8d247c6---sisuvalevowapi.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e22fac5d92e---82938247997.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607249cf183b3---duzinoro.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/78q6724i0b1kk1520r331nrm14/jadoga.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/65961085356.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/47577800399.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/ebb2f888e09acc3b5b1f857b221feecd/tojivadavokover.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/6016058933.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1cfee62db---xeguw.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/lolover.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b7dc2a0e39e3e62945dd750a4c97fc46/sopavegerazesuxujejub.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/60957108806.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/8610027277.pdfIn PDF document text
    • http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/69192361658.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/63825964817.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/beguvo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea028de2f7---2186799993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=largest+asteroid+in+the+universePDF 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_off0000fbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 17204 bytes
SHA-256: de5d34d6a727939043976df40d75d816777344ecfa0520d84fa6dce4f8f8eeaa
font_01_sfnt_off00012888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12888 10604 bytes
SHA-256: 89455e52225fbbb35a4e080ea26b58beaa9e87b649bce743f371cbaa644f7459
font_02_sfnt_off0001407e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1