Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d17b5e00e19bc9a…

MALICIOUS

PDF

78.9 KB Created: 2021-08-12 10:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9e7296fcb5b8f9065c82f6919f5d51e7 SHA-1: e31e365f54df42b0b04b47d692acc7f76c87cfe4 SHA-256: 6d17b5e00e19bc9ae15b8d3db7e4363f42c18d9a453486cae53a1ed59538eff7
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous external URIs pointing to compromised or disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a large number of links for SEO or to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://intrigantka.ru/images/userfiles/file/53137058549.pdf In PDF document text
    • https://euroroma-bg.org/files/file/93734571033.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/l0mtckfrs20gt5rhonqme8vmfb/mimujinabu.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/74733013841.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/wifozixanudimap.pdfIn PDF document text
    • http://darstin.com/userfiles/files/foxalipimafo.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/63f1219501da19c1e203e03b373b2a86/lerimipekeza.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160944f65454ea---solavabet.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/h84q8dj5l6b5fst0ho6n1iic3o/mudabot.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6bc4e6b09---nawixuzisikiposud.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/039d57cc556dac533838127f58decb5e/7924867037.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/ledirakir.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/64434350553.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6b05ca1797520c0919968bd55b302da3/93529259869.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16094454d01467---rezusavovajilag.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/wajamigaganitovexasaka.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/jisubude.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/r8hgaoj4aicjbgcmr3vi7pijag/27769446476.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/c07lf83mich1bfvbp33aa049j4/84785998739.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/2a234e9cc914ba4e8a6c8fef5821bd11/90558059290.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/lezeketed.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/99681349569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=png+background+hd+imagesPDF 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_off0000d2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BF 11008 bytes
SHA-256: bcc26abc20febc81c48282b29af7ebe7a107ea848c81423bff821e7d59554fde
font_01_sfnt_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 16244 bytes
SHA-256: feaceb4d60be2e4f7f00708d97c054d67834a5033dc5088a96c083dfd9b3fbe0

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