Malicious PDF — malware analysis report

Static analysis result for SHA-256 9197554d4b70ccd6…

MALICIOUS

PDF

82.8 KB Created: 2021-06-26 13:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 09f2944b500bdce05283e06a058c4614 SHA-1: aa706cbe269229dc99c092a59393f84a0d4d54e6 SHA-256: 9197554d4b70ccd602de5e2159137f3987526a52a10207fb74ad2dd678984c7e
156 Risk Score

Malware Insights

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

The PDF file contains a link farm hosted on compromised WordPress sites, as indicated by multiple heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the presence of numerous external links points to a redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160adf0e437295---92525529594.pdf In PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a7fc8b293dbf383605617985f234884/88948623533.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/volatavemijuxovej.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/am6i5aqo0v52fh6lhjde0v219u/43660369172.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/4nlujn9hvrtv7l8stqrmfvkee1/narojiwigevemukaji.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/susisizi.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae11e3bfd8---kudabojibuwepipuxipeg.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0771761a2---80341029502.pdfIn PDF document text
    • http://amandamaitland.com/images/file/32038142159.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/2b332bbf120f94245cdb79122bcb2f68/89061324272.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/katunoxalanebuxuz.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/21226104786.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/xuwabomoberojiwivuruju.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///xuvokapebodenepedek.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/2i8qkhhqhm3k0bdf2ci4p7mr0s/19411998036.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c943a13f306---44125520853.pdfIn PDF document text
    • https://carlojans.com/cms/file/dodirov.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/54f0b9a41a770a6555a67d7a902bcfb2/84409480116.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/97a08ae5ed43150b753f10892e1d674f/vetoliwawowibose.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/85374359792.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/69931857217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=moored+in+a+sentencePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 18128 bytes
SHA-256: 5a56f23bf8f0badf128f10f19e3881bb5f56c15e99c36580f5347278070f5056
font_01_sfnt_off00010ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA5 10308 bytes
SHA-256: e96cd94ac94f60cf6173856cb59f011da2669d9d5f209bb81f5a06e4466e953b
font_02_sfnt_off00012608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12608 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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