Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bdb7da36ec9a27…

MALICIOUS

PDF

74.9 KB Created: 2021-06-14 06:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c72064cfe9dd18551722a21aa58026 SHA-1: b42eb56f94bdaec6954c6e29a7cfee63b1977b10 SHA-256: a0bdb7da36ec9a2754c8402c0bcaaea4ad28289f64f0291c38eb324f968dfb89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file exhibits characteristics of a phishing lure, utilizing SEO poisoning to attract victims with terms like 'Devops handbook pdf free download'. It contains numerous links to PDFs hosted on compromised WordPress sites, suggesting a distribution network for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crysiq.ru/uplcv?utm_term=devops+handbook+pdf+free+download
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b0c4de4a9c96ea017e52836c93515a7d/zejaxivovaxatujowidimifa.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/90535bd14074178f6ec47e274b18b7f8/99244416455.pdf
    • https://namratalakhotia.com/userfiles/files/sekoxavenifikugeno.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a308f14f9---40994940273.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e16c1d1ac5056e3a983364fe2b62eed/zunezep.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd41264cf9a---64006769858.pdf
    • https://mygo.com/ckfinder/userfiles/files/74426981027.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/707a9a323c11cf88b556c00b2882e217/57393648677.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/cd8def0ed7ed38ceec1bfaa4b5826216/giluneli.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d09a475c3---8290851071.pdf
    • https://szabobuszrendeles.hu/files/files/88382458791.pdf
    • https://rosewoodcity.org/nbloom/fckuploads/file/97132328148.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/32575ef665de65f702f073e646c87385/45440393277.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714aa93a3b8---jaxebopomewis.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6bc0a2480---bawufof.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087432c29109---18052896712.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35e.bin
a2a35ebe9d36aaac239b531ba3af76d9402c8f14ff38a9f2c9ca998affaa7c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 5484 bytes
font_01_sfnt_off0000f614.bin
ac3cfd2d80a47fab7b5eaf932cc5f56c5db5d11aa05ac2e389d92f1ca2f7ce06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 11872 bytes

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