Malicious PDF — malware analysis report

Static analysis result for SHA-256 2289eb2f7aec4de2…

MALICIOUS

PDF

80.1 KB Created: 2021-06-29 14:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 880202ac8d268952cc5516c8f9ac5dc6 SHA-1: 68cb8db5362118a569255e04ca72bde24aeb5280 SHA-256: 2289eb2f7aec4de2d4c47b2542eb37a40ebcddf0a33913948e3d956bf688f1b0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for phishing or further payload delivery. The presence of multiple external URIs and link farm heuristics confirms the document's purpose as a redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16098c6e566ebb---vorumizudo.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/dakoxanorunobisunomin.pdf
    • http://alibabashipping.com/userfiles/file/81473499252.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e973b36d1d6ee9c72ed74e4b018d17d/rilidonijomalar.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/53620f099be53d6e117e9c6f91ae8e25/88022367414.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/c7d703d844dd48b1dbe84686f6f5b69b/sovasubisinitu.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/9a246afa24c9c2654c75c2e95532aeb4/garebatixekif.pdf
    • http://buchtel1967.com/clients/26382/File/20795565116.pdf
    • https://rocksoliddesigns.biz/userfiles/file/45651526653.pdf
    • https://honda-otolongan.com/upload/files/ladapabululamakibirolu.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/ea92d097d72037b3dbfc49dfd112fffc/wozijolusasopad.pdf
    • https://whitesal.com/data/images/file/2879_20210627155926.pdf
    • http://www.zywawiara.pl/pliki/77409825641.pdf
    • http://alemotta.com/resources/original/file/24463134726.pdf
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/93038621508.pdf
    • https://kovtec.pl/eurostyl/photos/file/kexozitagupona.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160724d51dfdbe---lutupekunamilo.pdf
    • http://nhs1980alumni.com/clients/878257/File/nagumavabemalava.pdf
    • https://cardion.dk/gfx/fckimages/file/59586908945.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/89abe450b062bbe77df16c59ef3d51ac/21053384491.pdf
    • http://agcslohian.com/userfiles/file/rudelulubetubev.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e23a4cefc---dinusaz.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0189d8acd---mafud.pdf
    • http://lordbeaverbrook1973.com/clients/76835/File/93222477615.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=transversal+and+parallel+lines+worksheet+answers+lesson+4+2
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD29 16792 bytes
font_01_sfnt_off0000d540.bin
6fa61a1877850df8bdcb5821987e662d6b1a9561e09737aa6e38c50a4158ebd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD540 10896 bytes
font_02_sfnt_off0000ee74.bin
98349b3e6c7c764f83935201628067853098a1240d7cc93de76ac35860e5a70d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 17572 bytes
font_03_sfnt_off00011c90.bin
34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 16168 bytes