Malicious PDF — malware analysis report

Static analysis result for SHA-256 922e0ed81e4915c3…

MALICIOUS

PDF

84.7 KB Created: 2021-06-26 16:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6dfe985dcf85f881a97abf63fca4c00b SHA-1: 0e0a33a8c7d96dd894d488b33c8f7dd4d7dc4962 SHA-256: 922e0ed81e4915c3ae84f8dac579cf3af7960eda7a5a741fd61d032511f723f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, directing users to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farm heuristics points towards an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crysiq.ru/uplcv?utm_term=how+to+get+free+mt+2k20 PDF link annotation
    • https://anmimar.com/royal/userfiles/file/84870203595.pdfIn PDF document text
    • http://ozari-ua.com/files/file/zewuzubupu.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/gtplb25af45bkpnqmcc8dlht1q/rakamibikijanewozopo.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/5810056113.pdfIn PDF document text
    • http://zuche0551.com/upload/file/baxepurulidukakip.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/58728990309.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/mubuwiroxufebilepifo.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/g36vmf2403qmbr3jdokq7re4n6/48321642158.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/87307489991.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/mexeguj.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/18330016408.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/89848551552.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/98684465442.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1622609417653749243.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/46805559509.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/75568604328.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/dufevanulozaridobejax.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/damunomojawazuduzeripi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/59811e8fb571072dbc613b90070c188a/zibejobarexe.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/40475414181.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085848d9dc18---32622647469.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/33ac309730d7db7e20f607e1c8bc061a/5418216201.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/b920718639889fe910e41843e31c1f6b/69845972297.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/d2287bfe2533752911604bf431549239/59705073867.pdfIn PDF document text
    • 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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 17264 bytes
SHA-256: 01ec89ce68464a3cc4d66086cb232ccdaad101c06b70180190381178265c8d11
font_01_sfnt_off000115f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F3 10396 bytes
SHA-256: 53aa5ce10c0c1b05db0d1342d99fd1b8cdf1089d338a672cf920941a9c5e88a9
font_02_sfnt_off00012d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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