Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e442a5a3b953dd6…

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 16:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d503b5ac4b15bf54b8630db58ca7d51e SHA-1: 738664bd79317ee081dade2ab3645338fec2e693 SHA-256: 8e442a5a3b953dd67f7fff3152a4e7f998c49f43d6334be1fedc5e97894adde4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution point for malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://daquin-ferriere.fr/userfiles/file/wudamenikadigarukanuturor.pdf In PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8sb4n6fsro1rl2g0blgskfpkj3/bepijidivosiro.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202108131936524454.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/46208296941.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/diwokoxelisesa.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16206212134857.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/senoxazurasidul.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/42021979743.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/tatawagujo.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/cfmeic8766ung03alrm543c5t5/14745914475.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/16367608495.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/wukiz.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/83157835850.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/77144981527.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/br0n7f7oj0mko1u00i9dl8thq0/folabazazorixino.pdfIn PDF document text
    • http://blatt-gruen.ch/files/vudiva.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/84213377037.pdfIn PDF document text
    • http://premium-h.info/files/files/pavipune.pdfIn PDF document text
    • http://finchamauto.com/pics/kagafibokazuzeg.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/55795384547.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/34f09bf1798166233c8278bbea5b6a2f/rufewunamafugefi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607297f21db74---50305324694.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/83492737041.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/tizifiriw.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a78f52b47e5---92101808085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mahindra+tractor+parts+manualPDF 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_off0000cc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3A 10740 bytes
SHA-256: 6f967f299510d2dfa886e3f2c67fc8684b70f92e453e55efea8271e7dc9d72bf
font_01_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 18940 bytes
SHA-256: 85f6207f87d989914ed34abaac8d88fc7e51ab9d9691d3e3363c6b182f0cb6c0
font_02_sfnt_off00011536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1