Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5f02d92596c64d…

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 06:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1bbf23ac552934e218bd15979b80583 SHA-1: 759083f70b03a02266b79a5b3420fa51cea0a665 SHA-256: 2f5f02d92596c64d08b4a8ddc302111fd99391079dce0acea85c89787b0555e8
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The presence of link farms on disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b8a922937---zusatux.pdf
    • http://ckpak.com/fckeditor/userfiles/file/6449461534.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4mvfcu6o1dmsgjngida2rud5j/53405642918.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/59af85b1122d45185588560e4c445674/koramano.pdf
    • http://onishi-kyosendo.jp/archive/66843872882.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33639daa16---14295687659.pdf
    • http://parzenica-bialka.pl/userfiles/files/29962885300.pdf
    • http://sun-green.nl/ckfinder/userfiles/files/2598925534.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/55e8b411666aee0af0482b3988a6a343/40383447215.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/pufozugawurutid.pdf
    • https://artlabjo.com/userfiles/file/katituwax.pdf
    • http://okulsanmalatya.com/imgup/file/sulixamomusonewolonov.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/85ae14eedbbe7387b1e4e9baae833145/zixoz.pdf
    • http://sskj.pl/userfiles/file/2832541109.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b50610cb33a---69998113517.pdf
    • http://modnyi-buket.ru/uploads/files/27327036564.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/4cd74ba5d3fc90bf76d6e6df40f6c824/wasedugoxemofotowokabadir.pdf
    • https://www.aukuras.org/ckfinder/userfiles/files/20092643810.pdf
    • http://flagrant-desir.com/userfiles/file/27006584847.pdf
    • http://ats-dz.com/userfiles/file/lomemenugixix.pdf
    • http://wajl.net/img/file/202175102812.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/0b7276d59530aa9a3ce2493978b3d668/34536684916.pdf
    • http://axwelindia.com/uploads/zosowekoxesabupebogu.pdf
    • https://atamergranit.com/userfiles/file/68616767623.pdf
    • http://phrabat.net/UserFiles/File/gowogodevoxodolixivorop.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/05728258e71c74f31a9a0abefd0580ca/nizawafozureku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=eusebio+de+cesarea+libros+pdf
    • 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_off0000df68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF68 16792 bytes
font_01_sfnt_off0000f77a.bin
c816acbb68975ff22246436d86e32ca015977bdd34603a2b76868e19e42e7296
pdf-font-stream PDF embedded font (sfnt) at offset 0xF77A 19036 bytes
font_02_sfnt_off000127f9.bin
3ce61526039f9aa6f3ce7a76c5bc3cc974d7640185c9818178140a09638e71d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x127F9 10636 bytes