Malicious PDF — malware analysis report

Static analysis result for SHA-256 178297a8ec561eeb…

MALICIOUS

PDF

78.1 KB Created: 2021-09-20 04:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f8a3c0f42b039d90d6a1985fb426a155 SHA-1: 8ec9ceffc47f00af244489c7cfc72cb8f7b1258b SHA-256: 178297a8ec561eebe49885d2d7e58e375e7fdab5120e56fd353b94d3d013a49c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The presence of a link farm on disposable hosting further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://inwebjor.ru/uplcv?utm_term=hunger+games+full+movie+123movieshub PDF link annotation
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613e123e4dd3b---22185728597.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb4ac8dac0---xesirubiterokob.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/43022390883.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/kalabivonisevolepu.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142635c8b6b9---kozibawepawuve.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/39318228412.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/16841621511.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/dikaguxi.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210919075408.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/83988927257.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/reduwesaja.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/zurekezazadamedusijosusam.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/23091332616.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/23270829940.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/pawenafusofagedikoguvu.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/rojifarez.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/5525213540.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/mutinot.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/8i2phf2rte5lvlq9r516r3cpi4/penezawuxanikosorobisut.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/21563541844.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/53220970118.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/366f357de5e070b426c5c009a6e8c6e2/kokawamenewipagenezijok.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/xevipekoxe.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_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 17648 bytes
SHA-256: 498ac503afc3d368a3f1fe01a9d9fbf758502707ca172a90266834b27d3fc953
font_01_sfnt_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 11204 bytes
SHA-256: d5dc39f38d762d90e94ba9599bc2f6ef9a3e362409c872c81b63211f084bb397
font_02_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.