Malicious PDF — malware analysis report

Static analysis result for SHA-256 172a56470f3e36cd…

MALICIOUS

PDF

84.4 KB Created: 2021-06-28 12:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 27a12730ac894e6e026b1eb89e54a030 SHA-1: ef22c09e2a4364c863de0e1a4c0524fa4ea614f2 SHA-256: 172a56470f3e36cdd74de7f066581685a751fa96f80d753e720b4d061efb989d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The embedded links and the nature of the heuristic firings point towards an attempt to exploit user interaction via a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db59da0d4e---xuwomadoviropusoru.pdf In PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/wufinofiwapa.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e9678aad2---57159342275.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/zusidazodu.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/lumutuv.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/22254f1ebefafe3c5734ec87c73433ab/zugebopelineziz.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210603_1F7DB73A6638F076.pdfIn PDF document text
    • https://x-software.cz/data/file/bekokapejuxusupu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d125b89e9f---55256873398.pdfIn PDF document text
    • http://abnicum.com/files/file/vesidukaloviguseremik.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/kodajikuwelison.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/oski3k2ifucqblesn091jv2v72/bexugak.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0e6a31c47b74415ba2f4997f9ec69d66/10684759387.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/1000e7e483d8f69ae70644168566d515/98934932596.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16089ad05482d4---23835228473.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608dedbb2f457---43514885642.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/tiludigokodalidoxak.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f1bf04187a6e96c3a5847cb83cc5ed9a/30963165443.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/8dfe59c326aff0ee41355d9d84871af2/15816049681.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/qef1gdupdrgfefi9ev1p1obr42/75766017097.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/butikiz.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef72ff1768---74626837000.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/moluwivurebadino.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ebfd8658a---14380984113.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c148069abb0---92764570446.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4e68ba4c---gepabixasojemim.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/goieclobi0696jk0et8nffhiju/36943938724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=blue+wood+texturePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/97820397030.pdfIn PDF document text
    • 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_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 16832 bytes
SHA-256: 1804e90eb0005f3b175bd3c096dc3a19650d81ce6ad9c423aad8d2a88a87daca
font_01_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 10056 bytes
SHA-256: 59933a0f444b44f34fe1ddeb4d722266d32f46df7db579612ba0e32f41cef53d
font_02_sfnt_off00012c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1