Malicious PDF — malware analysis report

Static analysis result for SHA-256 473f4c95de87aabc…

MALICIOUS

PDF

77.3 KB Created: 2021-06-30 06:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7afb3b220b3f1c643a022439d7439be7 SHA-1: 819f54154db1f2fd25d81c07bcacd59c4f427454 SHA-256: 473f4c95de87aabcaf59423aee4b3f0a44d583ca7ecbc9c98c2b845176169f03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam. The presence of multiple external URIs and link farm heuristics confirms the document's purpose is to redirect users to potentially harmful or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d490a2dff6---disefulolibunadanaju.pdf
    • https://t2sc.me/userfiles/fonasef.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc525569e0---pupofuf.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/nezezosojotusita.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84087f3b2---dekubotuwadetoros.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/povb5606qoudg6uvrmjvo09h8c/volixakinatutedepi.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a35cd687595---6923692112.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab614177c6d---93221079841.pdf
    • http://bawaconstructions.com/editorData/file/85626675792.pdf
    • http://augustaelectricalwork.com/editorData/file/51243093233.pdf
    • https://tosto.cl/ckfinder/userfiles/files/tilokuve.pdf
    • https://luathoanghuy.com/uploads/files/98996821558.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/pmsi4ltjl0qvent4pvekhg12d1/lekakodefolajozo.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96e57bf990---kojap.pdf
    • http://candemdientu.com/Images_upload/files/35401279288.pdf
    • https://atraba-holding.com/userfiles/file/bupeladizobulebonel.pdf
    • http://congtydaihai.com/upload/files/54360456413.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1be424b3d---81716172116.pdf
    • http://villa-carlshorst.de/sites/default/files/file/lovimevizexitubevobuzuna.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f159482a5---2249843483.pdf
    • http://myphammonly.com/luutru/files/50020542599.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607130bdf348e---fofifuriwibelixafel.pdf
    • https://liniagdanskzydowo.pl/files/zafofifebunawenuzodifomo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=crystal+report+convert+date+to+string
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c88f.bin
fe8a3e0a8dff9551f569621e4861b4fc42e8e53ec6dfbdc4555d9f64fc6cf2f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 17400 bytes
font_01_sfnt_off0000f6d0.bin
54b1dd0e371199b8011dae6363aef6e063d29f3ff7cfb76c5c4e0bbe6c462d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 10900 bytes
font_02_sfnt_off00011000.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11000 16792 bytes