Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf49164af3840d3e…

MALICIOUS

PDF

69.6 KB Created: 2021-10-01 17:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 527c4e491d05128e72d27f400160efdb SHA-1: 3830d2f87fd9ea8df418debc0bd5ca7df9087d93 SHA-256: bf49164af3840d3e2e853f8d597f6265877c791ea980a30ef0245c83b499e35a
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malware or phishing content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/piwowujebezapotufesu.pdf In PDF document text
    • https://takipcisec.com/calisma2/files/uploads/zevisitubexivo.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/norotowanina.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/89209268109.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/vemunokunuvu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139965dc6d3d---toluxamosirebivatabuju.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/bowamusudedi.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/88323819021.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/nebaremogonem.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141639e2232c---fepepiginu.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/lujexuguduninarigazozu.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/liderarevu.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/peluxukunumodovu.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/fetabovuvepudoxabifanev.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/65503953611.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/xekogumorusidalu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16151ace11c19d---tizuvoli.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/sovoxugibijararekop.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/loligoju.pdfIn PDF document text
    • https://keongracun.org/contents/files/41399346481.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/burigejeresutujejorom.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109110950366709.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/5pq6l1f9rs8pr3d95926a1vs01/dipubir.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/sabagebimabeviri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=minecraft+download+new+version+androidPDF 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_off0000afe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FF 10612 bytes
SHA-256: ab7b84412e7a44b763413c340d164a5c92078ebfe48cf9b3ce5b6126a7989806
font_02_sfnt_off0000e075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE075 15804 bytes
SHA-256: 43906677719e87b6cb2b7a2ce1551021a920093be9750f597fdcbe3b58b39063

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