Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fa2972aa4f09f4…

MALICIOUS

PDF

79.6 KB Created: 2021-09-12 16:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 426b81cccc7a0adc2a58e765fb6a6873 SHA-1: bd9d03e292a1b7ef06f822a3ebf701b1f5967160 SHA-256: e0fa2972aa4f09f45849a44240503da32383db703d188429c9e908be325cd9e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous links, including one with a 'utm_term' parameter suggesting tracking, points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://wastran.ru/uplcv?utm_term=trial+xtreme+4+apk+download PDF link annotation
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/gafomavezawiremovaketixir.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/6a5f27b87575a12a3d957a4f993255cc/poxeritugozupirir.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ef1d114585eb949e74c2a9bb8b680446/bizumoxofagizi.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/fopapotem.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/xugadumakesatemopexarej.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/buvedufavonukajawutena.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/gagefipotemapi.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/85493720170.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7cc013c14dcd3fe61f1e955c8f68c789/daxarot.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16139952ddf054---lovakerumudiruxulozonavu.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/zeguduzekijewidazo.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/kufenep.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/79134282752.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/ripoxazumit.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/wewuzutigivijiri.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/88322116055.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/78391253778.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/84177722768.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/fefefunu.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/30957176843.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/74055723546.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/dazamuw.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/vuden.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613456665632b---62362377084.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_off0000cfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCA 18304 bytes
SHA-256: bbe41fc19b9e19a34e22986e2b6b3db8fe6a9d03c3608eb18c321a896e2bb16e
font_01_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 10708 bytes
SHA-256: 1fc8b0caaeb7f3f7972dfecf740f8cbc3842d0947871ffc0467da1974ee81fab

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