Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ade18256c555fc8…

MALICIOUS

PDF

76.2 KB Created: 2021-07-26 06:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 54dcbaeb0d3fd35fc742c07d0f3e4b55 SHA-1: fd9f2d02d8315afae54bb2e70beefd9ec47dce1f SHA-256: 5ade18256c555fc8070e7074c1b0f7c4f8a8e5738dd57cac52c52cfc7b58d674
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating it functions as a link farm to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://e2ingenieros.com/ckfinder/userfiles/files/pofowedikof.pdf In PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/fnii48avsl4ao4bsi1d4b00n5f/20789670712.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/68933802ebd54e9a06a96e55098cc546/favem.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/rumilogorukefokamipeli.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/28136190265.pdfIn PDF document text
    • http://rideco.hu/upload/file/wilokuwiv.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/55655624495.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608846d721138---39760581190.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/foxopisa.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062314593654.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/55360923726.pdfIn PDF document text
    • http://tipiland.net/upload/file/833803461.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/16065583100.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-14/20210614103236850975.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/q42id3m4r2jttvs7mtlvn59el3/7427263877.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/zifabisonoselepirega.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/78404470616.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/nitadajedoninekog.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f12f0e3e48d42fb26c89e5b9205d5745/9949260202.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0f38f8e88bf7d6eb16118e1cfce2cda3/sibatikidizugezi.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/3c8ec7dba1c1793138f0146626067390/birozidini.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/1a5dd295372b43f7be13bae43da812ae/73239628357.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ag9k4gj7ola2sl8feei9m9svk8/dumoda.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca0f946c65---kozajowomazuxodul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=esen+yay%C4%B1nlar%C4%B1+9+s%C4%B1n%C4%B1f+fizik+pdf+indirPDF 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_off0000c476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC88 17656 bytes
SHA-256: b0d603035f6dae0e29d1dd3e99a9fc533afdca175810ce3e3f6ce52994e1fdad
font_02_sfnt_off0001077b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 10736 bytes
SHA-256: 939ee8c4d765955a9d7c06b0f364405e360da35f575e78a929f84e68715b597f

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