Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cd4ce179fd8a72…

MALICIOUS

PDF

92.2 KB Created: 2021-08-06 19:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9be6f9039f7d5e61e4b212a2304bfaad SHA-1: 7317b580461024e9bd94e46ab721d6f414fe8800 SHA-256: 38cd4ce179fd8a72243e0413ca35e1d75b3bc9a7334959eda5ea3d0d0444605e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting an attempt to redirect users to malicious content or phishing pages. The file's structure and the presence of external links indicate it is likely used as a lure, potentially for phishing or to download further malicious payloads.

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://allytemp.ru/uplcv?utm_term=descargar+geometry+dash+2.11+para+pc+hack+todo+desbloqueado PDF link annotation
    • http://akvari-um.ru/userfiles/file/dezafi.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc91b31b8be---94451627558.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/gogiwozekaduguzop.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/mazosepobolefu.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e3d695d02---67977274394.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ed09e67a6badcb975c880b69107ee126/tizido.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/21579104045.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/4859041052.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080462a72051---jugagezonotafed.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b2ccdab3e---60063041384.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/fe9bcc6180b91e3952cca6084f630949/ririsexel.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/a28017f99d27f010ad6cb05b7efa7f0f/68345440291.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/oco3fisrhhh6a7a18ts1enpqbn/demofowafilutiwu.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/benidota.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ca803fbcc---baluxupemodoze.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/bijukinulikajipumod.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8e656e367b031a2362592c0131d0e690/rafedesekili.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/napobojirunigaxotuxejasiv.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/62857156586.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/j5k5k81gi7r2fek5od95jc2o6s/13591160545.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160df30c305532---totonol.pdfIn PDF document text
    • https://epiphanych.com/images/file/falivuwekevuxun.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/8485501835.pdfIn PDF document text
    • https://immobiliaresancarlotrieste.it/file/lamed.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_02_sfnt_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 19320 bytes
SHA-256: 0efbf83e5a6d41d064678cc7405db62c4bbbd6ce27b15d88db5fa0c85d86961e
font_03_sfnt_off0001442e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442E 11596 bytes
SHA-256: b2b87d59df8b4ea48cdb25ffc6b216bbb66d37294c61c47556ddc3d38b8466ff

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