Malicious PDF — malware analysis report

Static analysis result for SHA-256 725b64259a97e5df…

MALICIOUS

PDF

79.9 KB Created: 2021-08-26 21:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4faa102d06799046e2206177466da8d1 SHA-1: 27506f05d95de0b1ba5df9b2bba406edee2797ca SHA-256: 725b64259a97e5dff2dff69595bdb1d7cff6a11cc1500d4b3e5094803e73f9d6
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other potentially malicious domains, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/5e2bae9a8350ca045d4fea0ca5a9dfc5/80959464096.pdf In PDF document text
    • https://drinkpoint.com/uploads/files/lefotodibudemakuvafaxuvob.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/86199295572.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5fe633484---rexogowewufafuku.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/18160970792.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/942469873f45b22beaa4421debb8c48f/fudepukenitupanob.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160adc2bdec211---buraturapegizaledadenub.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161050d609ebd9---bubogiv.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b2b87f36a---94356447558.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/44000923436.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/25959124427.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/67320504455.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073467640c65---98162779604.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fnj50j6cbcc7jjdts52tncfdua/zuwoxazotuvupuki.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/21625264038.pdfIn PDF document text
    • http://hncastlecable.com/d/files/wofitixipajogoguvusuras.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/gaxubadem.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/906ad52f25b7dc1c9600d5450fc70192/zozegozotu.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/dekewaxo.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/ov47ra3sqpsi3cght2irjf1q46/jokedejebuvaxepofaluwi.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/dapazomilegemonojafepabas.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1627407404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=acid+base+reactions+in+organic+chemistryPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 16948 bytes
SHA-256: be4ff3cdd52c888202a2696fbec45a89e42f89a15e23d8c2a224795fac1bf1ad
font_01_sfnt_off00010074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10074 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001188b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188B 11008 bytes
SHA-256: 8b3375fd861b3b8545678bc164aa3fc426c44be16d0034c8fbd56ddc7de80f16

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