Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a219332cbe6d01…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 22:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 01e122a0bb717a5e43c1f1c9cd956ac4 SHA-1: c8eb2014f290a4ad3ffc26210d10ae431ade0323 SHA-256: e8a219332cbe6d017933d8bb19089ccfa4acae69167354b78e7aefcc41f1914e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing campaign. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://infrive.ru/uplcv?utm_term=wooden+dummy+dimensions+pdf PDF link annotation
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d9ffaa674---73156948780.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/pabezazalejukesen.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/t3raf1gmddabn0knb24kfijl95/63363427193.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/barokefewukobemu.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/gokuj.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/zasenazax.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/rakerezitavulinalogapur.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/95723064374.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/p2rn8qno0e2n0jgv7sm96at9m3/20649433886.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/mifivetomuwinusuxejogimas.pdfIn PDF document text
    • http://landpas.pl/upload/file/tetufozugopa.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/5b7979867b61b33dc6e888a9d3583760/22337487642.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/jugukikamo.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/cf48f4ac6eb072c183e77fb56a880a17/malajuxupizosaxowi.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//33991699205.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb83e52d9---ruduzobijiwale.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/92ffen3tigk28jrn60u5rt82cs/94841743803.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/98929573525.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/68844181105.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/de15e748eca0e9608934ceba520e99fc/mavigos.pdfIn PDF document text
    • http://askort.pl/Upload/file/44984126964.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/ronumimazesanafet.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/zusufarafusow.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/32876395851.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0cb53e53---94804728379.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_off0000e00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00B 16944 bytes
SHA-256: 141067bbbcb683446cdeac45a96bf852685558f5d7930fbda1d15b81daced780
font_01_sfnt_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 10460 bytes
SHA-256: 3f838c5be9dac1676524ceb32788569922278dc8e0979c9bf0d0dcfb44f66fe8
font_02_sfnt_off0001237b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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