Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e42b9bde4e748af…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 20:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30eccd67fb3c03af213bba84dd3a2afd SHA-1: b56bca7019f2ae5df5d7f5f375c21528c0f825ce SHA-256: 9e42b9bde4e748afd9259acb044a309646529a52efdd661bd15388d59b38b8ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The file's structure and the presence of multiple external URIs suggest it's intended to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bright-inter.com/file_media/file_image/file/23532687934.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872bd8c48e8---xazavutafonasu.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b8glcacu49i74m26ge3g9886j7/1501314683.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607716db703bd---9598431649.pdf
    • http://moyamoya.center/images/hand_uploaded/files/99606927228.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/8d254a222d697537b87d145ea9226a2e/peposawuga.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/pomtdpesafn1p7k9g9arlibeqm/fijaxudibawetabuz.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4021dd4d4---18836824597.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b166cc7339d---26397821663.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160873d65834b6---zazotuzuv.pdf
    • http://www.asslar.de/downloads/legufusofelegorinin.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf7dcccf2a---wamilexowakepadupesagatul.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/q5rrlr3gkg01sh5875bohl8pg6/kixonafexagenatoziribixun.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/346413816e6c5bec4864f6e5f53246b6/daferib.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c33413135c8c748775a02605a56236fe/45436340436.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/iarrn1r3pteph6c8io13bgt39t/44798687469.pdf
    • http://studiovalentini.eu/userfiles/files/12946369918.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094266c90f9c---44787428803.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c943573d52a7784a515f538710e67b5a/muveve.pdf
    • http://angarakshaksecurity.com/userfiles/file/62850492352.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/s5q6ovnqauhq9d6bp0a6h671m0/bosuviloluros.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/0b232c6b3916245878d2fbc18f41c83e/medibebetadogumapuxekej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=reasoning+and+mental+ability+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_off0000e63a.bin
39a687d79052b8db7a691513a4f6dc30c4ed79841a90697cbe63813884188f11
pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 11040 bytes
font_01_sfnt_off0000ff7e.bin
04c3a1d1517f2cdcb8275844c559aaad255d2261c7e54f19d9787450d9468c84
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 16772 bytes
font_02_sfnt_off00012b39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B39 16792 bytes