Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9ad4216b4625a5…

MALICIOUS

PDF

89.8 KB Created: 2021-09-01 01:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e67bb1537ba1606c3b906c166cb1aad7 SHA-1: aae37cc7578c5a868cee7f538c8a9e370400b7f2 SHA-256: 3d9ad4216b4625a5a616038e8820ac0d6f1f7558fb5a90464c1cec74538cd869
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a secondary payload. The presence of embedded URLs and the nature of the heuristics suggest a phishing attempt disguised as a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gamaconsultores.cl/upload/file/gupebatixonobowijosorupaw.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16106657115898---35092728817.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/27634250745.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117b904241d7---kilisafagoxiru.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/11632107287.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/57895250463.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b7baed04b8e0d467be71b8bc4d290b5f/towodexebazizew.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/64784643474.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/mivebozegejerolozidegame.pdfIn PDF document text
    • https://theurbanthinktank.com/files/xuleriwisoruli.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b27ade48768---sububiwekasafatemedutu.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/xatasurumeji.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/48133641298.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/gupomedorewunuzav.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/fugud.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/paskc4sitfd4bcc4888qlespkr/totebusi.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/32269115794.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/8d57d3238c7b36a0eb1f51fdc2873371/77535062049.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vok3mi6j1admf8q9u134nbuo2l/30105984670.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/b6b3a6b1632a6eab2c2e88871943e760/39146017377.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e11e7494f8---resirijunul.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099e901648e1---2044380934.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae06b4817a---jatidixutadik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=wwe+2k+download+ppssppPDF 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_off0000eef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 10388 bytes
SHA-256: aba1e27bc5c8d765c7c10987d7cb847c0dcef345e3c24663a26295192fae1d8e
font_01_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 21804 bytes
SHA-256: a8d41f7f75648c2a35856331c68af7fd6cf70f226d6f931506c1e57d2d44e456
font_02_sfnt_off00014007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14007 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1