Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee72a94c668a7d39…

MALICIOUS

PDF

99.0 KB Created: 2021-09-20 08:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 26f9874cd1a3d1b07a66748cab427ff4 SHA-1: 41613cb9c791e7ecdd65b74e4a34c8d6b8817dba SHA-256: ee72a94c668a7d39f3202ea8b4ae78bde58ae6c558ffb9ce64ec6194919b9805
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload storage and disposable hosting. The presence of a 'dream league soccer 2020 download free' UTM term in one URL suggests a lure to trick users into clicking malicious links. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

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 http://paykaaluminiya.ru/ckfinder/userfiles/files/36046161881.pdf In PDF document text
    • http://thuocnam.xyz/images/files/pofuvamokuwuteliguvufuza.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/zodagixaf.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021091823520251.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/pawepebapisavalenan.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/wolaf.pdfIn PDF document text
    • http://word.mn/uploads/assets/xavuberuxopobumikulib.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/38124229689.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae6802f0f3---6065315112.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/28036914677.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/kudizotusodifaxen.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/36569061662.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161341d931b083---67193462287.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4b86d862e---87410138300.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135987e2affd---naxexolunaxosewojolukes.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef119627ea---lutujufelinot.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/97240172850.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/rupumodowopa.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/38146652939.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/62390976743.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/60814486051.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/dagasamo.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16140ec33b7e22---38418330215.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/29958334614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dream+league+soccer+2020+download+freePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 11056 bytes
SHA-256: 1fe907c23b0f238954a199a29e9da94b97cb9b8a681595e191785e8f95661edf
font_01_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 16316 bytes
SHA-256: cecac62ddf9842e24e5aa295a7437217c35a03ea3258f310dcaaa5844d6ce37e
font_02_sfnt_off000120d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000138e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E9 23428 bytes
SHA-256: ace9531907805a9c8c06b3e3d03bf423f8c024aaa1034f6668ba4930479c199d
font_04_sfnt_off000174f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174F6 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc