Malicious PDF — malware analysis report

Static analysis result for SHA-256 014b65cd145f1811…

MALICIOUS

PDF

84.4 KB Created: 2021-09-08 21:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ad3f5dc68548ce3973ccfccd9cc8f885 SHA-1: 0a2bfb1506d34561863969ee0fea039f7ed11e05 SHA-256: 014b65cd145f18115bbef398d24066aee0dc020b7fe172084ea001bdb501ee4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads and disposable domains. While no scripts were directly extracted, the PDF structure and link farm behavior suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://droneducational.com/admin/userfiles/file/xotenajedorogilonagiduto.pdf In PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/lafolozenu.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/71949006206.pdfIn PDF document text
    • http://evola.it/userfiles/files/87973469743.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/29317813044.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/vilowirapaluwogusexuv.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350a5160d23---kavedemo.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109070059038724.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/varojigun.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613237ec5fa4f---31945145067.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/15807548164.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387e30c00b7---720193816.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/12450888874.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/pjot3pqom6kc3a3t83uurntue6/41268034390.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/mixidawexog.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/kezesenapakaropuza.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ctg01mjs3iijvl6mgqc51mgi46/68611290186.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/34271913240.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/xalujuledowepovifapifit.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/48235364193.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/7a309f8e353ec56b8d172a8d360de4a7/57286747605.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/73917657595.pdfIn PDF document text
    • https://matricula.arendic.cl/files/45692796071.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/61693087451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+life+aquatic+putlockerPDF 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_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 19268 bytes
SHA-256: 93600e1b0ed6e9fade3b679121de021433a3a15af1b0c1d779a54b64f365257c
font_01_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B29 10604 bytes
SHA-256: 60045d432e5b62ffc6bb4aaa5a2e3fd9601eb2f892f5413b06e9d665c8a16d9c