Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f34f96e9420179…

MALICIOUS

PDF

89.9 KB Created: 2021-07-14 05:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 18c1af70a8e7215ad880f1994cf37eea SHA-1: 4d4164112ad60d43787c48f71f8f636b1d38e35b SHA-256: 75f34f96e942017902898aab3b957eb9db6382393825d2da14e7a93cef0de5f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=gravitation+class+9+ncert+exercise+solutions PDF link annotation
    • http://ridendo.cz/files/file/xedunoxipew.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9374c821bd9943d07d98f014595d8837/91257992925.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/wukilopisoxadibu.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/h21lnto5asf026vrtrf2mjvc3m/tatumurinumigide.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/nefokafezebozize.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160de0c67df181---6575612137.pdfIn PDF document text
    • https://landi-bg.com/images/file/13383525376.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f209043a0---42892384201.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/f35cbd9e3153f97364cafd0da7e8c1ae/89684205595.pdfIn PDF document text
    • http://change-sexy.com/files/files/gudarexovum.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb15659a0---66246188062.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b60c2c4d0c---44967743883.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/4333aae211592c6adacd8640d8ff9086/48332857500.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/60263280664.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072e5eba9182---pusorefaronorotoruda.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/bifikotob.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/259c3fbc17f1fbf5774190404cf7753d/vemigeninofudukewukuwa.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/kuzekukokarosimalo.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/07e48be6f9b57ebf3ba57f381fd8c5ed/44436090746.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/zewofow.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb0f553fac---firetekezawerunulurafubo.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7c2eeb64632fda03b305029899d412d2/51755348701.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/13757884280.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/98593249060.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a5522fb052fd38b8cc87d9fe55fdd249/kinibovosafeboxinegevuv.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_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 17392 bytes
SHA-256: 9768e9a3fb7dee638a97292f0e29fbedd8dbd575a9d0933aeb4b9ea1d7391537
font_02_sfnt_off00013fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC5 10696 bytes
SHA-256: 660347791218e9bdcfdf7c64984193df46516a92ac34fc9deede9e0efe3414ec

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