Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6ae8565bdfbed7…

MALICIOUS

PDF

74.0 KB Created: 2021-09-20 01:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f1881484f81b61eb4699f1c6de5ecb8b SHA-1: 8caf29cf19f05350a760c60186546eeaf7e1d07a SHA-256: da6ae8565bdfbed7ffb8c512221d67508201b31bb7bd8b0fb103a8360c4d474e
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 phishing or trojan threat. It contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS upload storage, likely intended to redirect users to malicious sites. The PDF structure and embedded content suggest it's designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://inwebjor.ru/uplcv?utm_term=loma+lopez+stream PDF link annotation
    • http://hanasushimenifee.com/uploads/files/28023735914.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210913155755.pdfIn PDF document text
    • https://nepoo.ro/app/webroot/files/userfiles/files/zixatevepoz.pdfIn PDF document text
    • http://didula.com/img/file/21887113655.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/63839613935.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2ead3a537---wajudanazunavupape.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85185407705.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210913_4BFBF80DB71D0620.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/kolubusiporetapap.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/774426897.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/92718481526.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/63292408292.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///budabojez.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/nafelapap.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fodumisixaxi.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/wadagaguderafanijoda.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/55518792566.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/33550541477.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/37164928910.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/relifuvuveratepotugu.pdfIn PDF document text
    • http://elitk.ru/_files/mofafon.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8ea0308f73df1699134a10c8ab488e6/57984961104.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/gonuduf.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff60e1ff11---80864988773.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_off0000bd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD21 10232 bytes
SHA-256: e965ea36f4bfc077137a1ce3e90997ae7fa9fdce9efb6b999cfa5f821616d20d
font_01_sfnt_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 18028 bytes
SHA-256: 93ab4a5cbc95ec150487015c04e5bc6060b96e16b577a40805c60cbabbad3148
font_02_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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