Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e008d53cbf2cf6a…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 21:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a86c8a16a864ec187f5a5750ce94508 SHA-1: 5824fe8ac3392e2a9dd018a1ced615f7880793be SHA-256: 6e008d53cbf2cf6ae27d58fc5da3455407ace37b7a931e2b24058354469fa195
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to lure users into clicking malicious links. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://smidgel.ru/uplcv?utm_term=men%27s+clothing+patterns+pdf PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee6871706c---97166196444.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/18a80c226420a63c9c3e6e999bb6bab5/18179994391.pdfIn PDF document text
    • https://gulyaskantin.hu/uploads/frontend/files/wolabizumati.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/i5pfcffb0t5c1ai74rfrl3aumu/sinosajojosemuniv.pdfIn PDF document text
    • https://securitydm.com/slicice/file/88214425207.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608819df4b4c6---84938950860.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/maxuleseterofaduno.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0231a9c21---jerudisojavejotaper.pdfIn PDF document text
    • http://apvn.info/userfiles/file/taxevig.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/tovenifilot.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/sotijuzor.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/wafavemebotetofavape.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/41174753235.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/46680388938.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/vedusemo.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/kazum.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/97b4c441868f39bdb218d0ce6aa32d25/sipudopekizefatulifuk.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/zamezefukanoloxirapemosud.pdfIn PDF document text
    • https://digireg.sk/upload/63498911492.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/d7b6aeaeddea0d6eb7d33cad9a431904.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080827b68db8---15054317439.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/wugewizorakaxu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 10924 bytes
SHA-256: 4e3ae65551aca72b6a6984533e57f8eb2177727ec7bf19a629a24af4c71a5418
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAA 18108 bytes
SHA-256: d97246818c8d63e2d363ca4218a1c9cb09db493ab5985ade1c5059aa4e876aaa