Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3d38f3ae0848a2…

MALICIOUS

PDF

86.4 KB Created: 2021-06-28 18:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 01d72ca0cd71fba811b3adfd0b823a6c SHA-1: c6f994177dadca03441ea26236702d8866fb0269 SHA-256: ae3d38f3ae0848a2bdbec8b925bb87d286520e61723aef4da6a6fb1008de0ee0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to numerous compromised WordPress sites and other domains, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of multiple external URIs and the overall heuristic profile strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://wksystems.net/HotelEstimator/userfiles/file/23323452799.pdf In PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/f8305a93312f6d5ed837f9c6848e4343/rarerumetodikimuxuzilum.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/dc1aa308844992fd1842f0747bcc6ba3/3778689433.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/67635182048.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/44184832497.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202106200359326501.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/44d4df29c754d941d424f3d153664752/xojirebonaxif.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/92964269803.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/92929035544.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b494511a6feed0b2d61d129bff829cfe/2910865239.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/58bd7b9e9488e95a0b99e861fceb2005/tuxafenisunil.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1d3466129---62602802543.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210611075603.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775fb3a4913---46667358781.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608763899291d---livenizijodukotujexo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53af574975---wipinatazo.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/67973604755.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160876d779dfda---27741696941.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f8530dfc2e984763cf26e9c7feecc2e2/53334068958.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/peseburozuziba.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f40b08ba0---wixon.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/13879063825.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/rofaxenojoralaromuru.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c471ce9c69a1a9be5509464bbbb96fa0/mutadegif.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/volugolunesepoko.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160734196c7a68---33104801190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=grokking+machine+learning+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_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 10932 bytes
SHA-256: bee30af8406ace2cae8d749e9b84533ef5b26436b1711a40eae8bf7a39740051
font_01_sfnt_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF4 16960 bytes
SHA-256: 3adda9001119d150119677bfd2f169f50f7a8f811dd5b47b7e7da842c1353e94

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