Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27aceceb0c745e1…

MALICIOUS

PDF

84.2 KB Created: 2021-08-21 13:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 995425d04ac9dca01c66a6783cfe334f SHA-1: ca038bb0c3a501d06e19a69ab5d14749c2b497cb SHA-256: d27aceceb0c745e19daad8cfa6d10085b4fd2952bc38e0c412e105e65128e7fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the links indicate an attempt to exploit user trust, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b86c2a060bc2d6f7ed3b61f9e7dfaf21/5006746184.pdf
    • http://qcfloor.com/userfiles/file/28923927156.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f0a44b3500---81918601353.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082adf4e57e8---jenoxerajanenikuduzosoj.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16071b157c57b6---296212759.pdf
    • http://vssteel1999.com/ckeditor/userfiles/files/vilibusasirejomita.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/053444c7bc0d62f830da2c3918e0c2ec/63575819593.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9eab508a58c62ddb9adaffd1ba0897d4/50757623062.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cda9a01dc6---pulugonebiniranixuvo.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d382e3aa4c7---74001524330.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906426491b9---gibelusabudugo.pdf
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/wamapukobajulakunasenumib.pdf
    • https://sdhouse.info/ckfinder/userfiles/files/remubinokobatokunexaz.pdf
    • https://przyklejki.pl/userfiles/zololatufagutojexekofila.pdf
    • http://ccswcd.com/userfiles/file/59791776889.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/20ab295b5fa17479f4259262658ada3f/21663777256.pdf
    • http://afghansolar.com/userfiles/file/43568544140.pdf
    • http://lokalsport.no/userfiles/file/zabid.pdf
    • http://designerhouse.ru/upload/files/53479989204.pdf
    • http://munsusa.org/userfiles/file/20210602185212.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1af884bdb0---pobetidelelogag.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/h2r645ji0vil6okluse8qh0p5c/38215374191.pdf
    • https://rh4-h1tapi-turbo.com/contents//files/55924209415.pdf
    • https://noticky.net/akce/fotky/file/63101323602.pdf
    • https://et-auditing.com/userfiles/files/71309736949.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160abafc93e6da---45557431479.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/6f5b7dabb9e69813ab893fdf9c7cfd9a/36404234617.pdf
    • https://louvre.lv/res/wysiwyg/file/xujezokuxakulek.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=job+analysis+job+description+and+job+specifications+are+interrelated
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2cf.bin
1b478e5a37f1bb7f7ade7107bacc740b303210b1f6adb02026f9bca3114d05d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 16564 bytes
font_01_sfnt_off00010de4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE4 16792 bytes
font_02_sfnt_off000125fb.bin
688e2f33d2cd9722f44beec0e1f4ec1cc92a62026c97d8e15dba6c3be3c0603e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125FB 10988 bytes

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