Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2958638030d951…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 00:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 746278dc59bbd0f4b418c882a98fcb77 SHA-1: 03d6ae2a0b38544a6402bd78ca1628c992acca76 SHA-256: ae2958638030d951e192e5c8930f85af69b5f56039deddd858a395f2a6e4d062
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some of which are hosted on potentially compromised or disposable domains. While no scripts were explicitly extracted, the presence of PRC/3D content and the nature of the link farm suggest it may exploit PDF vulnerabilities or serve as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://bataretak.com/img/files/file/xuxovenatifuxeke.pdf In PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c205a5bcb6fb506ed2a190ec2786cf96/baretinoxekumevixin.pdfIn PDF document text
    • https://edarky.net/data/file/25845447925.pdfIn PDF document text
    • https://seikai.jp/free_images/files/25482403589.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/wuzebajugemumowiberanogo.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202108232158435262.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/72783048803.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/57818900303.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab7c9c99d0---pefosakibagol.pdfIn PDF document text
    • https://ancoraeducacion.com/images/25609337533.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/pikuvazekos.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/68476982886.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/5318d073144b35552443a20b1e34d8e9/papewuwuvuf.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16119d7e8e2d39---65687681526.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/181b4246d62b9db95945a9c0f4d34bb9/vavenatodivepowu.pdfIn PDF document text
    • http://lactopad.com/uploads/files/87851613469.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080659780394---walokixaduwijekaw.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/fu18jp8lgqjl0qm48qe6pe7313/86915870375.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e2f6a9b630f8c6d99af3d36e79f5c308/disititif.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858faf8d5e7---ruwasidur.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/ssb5a72iab4022abvml4ql8nok/58721718224.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/77234739135.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/jutos.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/rezebuxatejep.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/51208289025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=hyper+converged+infrastructure+nutanix+pdfPDF 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_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 11124 bytes
SHA-256: b79216f0db360c06fc4be51e780ca9b2da0ab6853820cb1dcfc8d454fcc89ede
font_01_sfnt_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 19316 bytes
SHA-256: f1d02e9a48de9b2bbd5ef7eb19e2b5a1f5da4ba9009b43c8829e70c0398411a3

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