Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7d89923c9fbc99…

MALICIOUS

PDF

69.1 KB Created: 2021-09-13 22:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a22f9629f51a37a418843dde5cde5418 SHA-1: 131334a7a8c112625cf4ef47a02250f94b2e1353 SHA-256: fb7d89923c9fbc99108fc9086c44def654c373b10da4dd1fabfbb3c0c7eae946
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs and link farms pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URI links and link farms indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • 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.
  • 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://queure.ru/uplcv?utm_term=djmax+ray+android+download PDF link annotation
    • http://yushendesign.com/images_fck/file/1631248442.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16134e8128b3f7---52679502217.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/pojafatudelupewebadoxugi.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/sanexofixevatumu.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366a250c451---35466223097.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/fofimoz.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613476b9d6903---12552533743.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/mevotijofosarolifikinexo.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/3862795675.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/90074062558.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/56262233370.pdfIn PDF document text
    • http://marketingnews.fr/images/file/gatuv.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/forevaboxisa.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/binun.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/47615223516.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/10578204511.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/ruxonopababiju.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u4oluuf080o008un05emnlpq57/garujepuposetulu.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/31597035782.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/vikexosegizoruf.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/ridexatuvofoxizizafane.pdfIn PDF document text
    • http://yongqingtech.com/d/files/87755444316.pdfIn PDF document text
    • https://epiphanych.com/images/file/gulevilibagawuten.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///wixeledoninufas.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210904140438.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/raranirogedavijabi.pdfIn PDF document text
    • 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_off0000b0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AF 10444 bytes
SHA-256: a3a3f5d714832fee5de705bd304271e4357ca73b28718d04ceb7004268a4f12a
font_01_sfnt_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 14768 bytes
SHA-256: feda84c6e36216d85d7be49e5dffe684eb3ea48a52d0e3903aa00f4c8ae4fda2
font_02_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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