Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fcaf37c62ed1c1…

MALICIOUS

PDF

75.3 KB Created: 2021-09-04 08:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dea739324dc0e076f06e86043460e1ed SHA-1: 183784e3d26ba48898a5b11d9b0638ebbf407ea5 SHA-256: c3fcaf37c62ed1c1d0003060528bebd316a4659ec5445b3b420e16023aa87b43
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b93ef42aaa---4076211951.pdf In PDF document text
    • https://procogs.com/FCKeditor/file/zepizexarogadanatoziso.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/63718007281.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/54493947276.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/kokorifef.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/m880flgiqgvjbs435mph2a7tp7/vamarodigasagobawobugik.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38fc37f7bb---3384624595.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ad83354fe7675914d66043820ad09aef/sofegusidumefelopen.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/57f6cc134443055c42d1c66aed85a84a/medefisagulusewewapo.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/34984812979.pdfIn PDF document text
    • http://markone-tools.com/upload/files/divavudadujap.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/kakutafoluna.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b9e6c319c1540af8c8ba7fb20599c4aa/22645727245.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/jasumuburixefuzopur.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1611307b3e9b72---jevoraladizewawinenaguwet.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608122e9ab378---romazakorinimu.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/kodosa.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/f280c8c4972dcded332bd56040a494c8/50234822160.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/57916571580.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/17870881218.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/07e6a1fec37112bd5abb1bcbe396fede/jevojavixomepebupafudase.pdfIn PDF document text
    • https://windsbs.biz/files/file/lojezuxilonosuge.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/konudowagil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=365+connecting+questions+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26C 11112 bytes
SHA-256: 2fcc190365c4a222d37fb1ccb26bfa3df467cbc7e3ad6e70749f145ef4e1de3f
font_01_sfnt_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 16828 bytes
SHA-256: 917cceec736c08fd419ae84b8f1403c70d0437a08014ff227a8e74aa6f5ff270
font_02_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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