Malicious PDF — malware analysis report

Static analysis result for SHA-256 0247f611140fc0b2…

MALICIOUS

PDF

83.3 KB Created: 2021-06-25 13:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0bf85b7cf5d99782107551dcb1a100a SHA-1: 1679887fa91952bf0653843bfdbb9f6b1ff418c3 SHA-256: 0247f611140fc0b2608f3849919775cd1e1166a8fd9e8ea497f2e0dbd29aef5b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to various compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/400773934022a1c4529e4695add77734/38730665386.pdf
    • http://barudan.hk/UploadFile/file/20210620210846492.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01b5de9807---8627893563.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5e6fa39afe5b4f819e5c7f1d7a46b2fa/zidebiwuv.pdf
    • https://mimpishiosatu.com/contents//files/57886401580.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771a610d9bd---15842613581.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/acb7ml3h4geu8j2qpol1jpjva0/60776273694.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e757c41ffb---87316446005.pdf
    • https://adasms.fr/userfiles/file/gujaziwasekibo.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/18dae4dd8c4fd354ad80cca8206cbce8/poxel.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/5c23bc55701fd2ac948e2dd26085ee5e/6815592510.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6414bab12---1310697264.pdf
    • http://dallapietamarchisio.it/userfiles/files/manefokenupakezoxus.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075104fc4035---zarojadobajogimixoterego.pdf
    • http://www.heksan.com.pl/file/20312157575.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=software+project+management+lecture+notes
    • 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_off0000e1d2.bin
081a783d470efb80dc35d265f9c0acb299bff6836dc1d8d4ad542a15c7afb074		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 17060 bytes
font_01_sfnt_off00010e66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 16792 bytes
font_02_sfnt_off0001267d.bin
2c0c4620dd30987031f7fc2aabfb831babc695d58d8effef9b7a5bf6a6fbe4b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1267D 11120 bytes

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