Malicious PDF — malware analysis report

Static analysis result for SHA-256 c376f0dee49372e5…

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 05:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c2247220a64c1de9509511f693b6219b SHA-1: 92b643e777ade9ee73cdfcfebe11f876546e52f0 SHA-256: c376f0dee49372e57022856275d922f340a6ba6be1ab04ecd05368601a598d2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress uploads and disposable hosting sites, disguised with UTM parameters suggesting a phishing lure. The embedded URLs and link farm structure strongly suggest the document's purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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 http://litho-and-co.fr/ckeditor/upload/files/delujekalurir.pdf In PDF document text
    • http://canvangdientu.com/images/file/50328438783.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/42lsoj53h9sm030re0mcvponof/reduvoruzavorofujupira.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/wenaz.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/1bq182548ebfffqu85gv8vipq5/zakatisabitixuti.pdfIn PDF document text
    • http://emannsltd.com/userfiles/35895490085.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/tgd44jl418et3t6qbm6i057c7s/nijenuxokesevamotino.pdfIn PDF document text
    • http://drironcat.com/images/file/27597950432.pdfIn PDF document text
    • https://yellowstonewildlife.com/51022839168.pdfIn PDF document text
    • http://freewest.at/20927929375.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/4a9c23a28dc825937b45f00de0054f24/75383683775.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/lixuvadofaxogotigewija.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/51789399917.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/72006002546.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5fc624193---24074263877.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/62016582366.pdfIn PDF document text
    • http://churchillreunion.com/clients/72216/File/63744464091.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161147f662862a---givipalajibaxasowutexen.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/bagigow.pdfIn PDF document text
    • http://all-premium.com/user_file/files/gibonevuvarasuzoxilut.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/71491545793.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e25b7e4dea---83595889056.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/eid5201fiofljuad8rr67fklia/78947730899.pdfIn PDF document text
    • https://akbaturgame.com/calisma2/files/uploads/xovitovuxuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=contract+acceptance+letter+sample+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE533 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4A 10720 bytes
SHA-256: c38aa03cfdba6639782e4b091ac55318eb763b412902b05b0805a328100fb7ee
font_02_sfnt_off000115f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 18252 bytes
SHA-256: 83b87a0a2ee31946fa06399f75b699389c6f639bc30bcde4a334065cf9120d59

Open this report in the interactive analyzer, or submit your own file for analysis.