Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf2b34a51962af1…

MALICIOUS

PDF

67.1 KB Created: 2021-05-15 21:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df19c09e86c3c86d59baf76ba125fd0c SHA-1: 585c407655d22e2aeb140aadc7db67c5d33a8f81 SHA-256: ebf2b34a51962af1e5da674979081185b8a167c9961cdfc3d0dc4ba91517b9db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farms indicates a likely spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://munord.com/wp-content/plugins/super-forms/uploads/php/files/b37bc598f06dc49fa1d1d53d338cb18b/tomugifevusovedasi.pdf
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/18de24b473c0671339707f777e75973c/70400374031.pdf
    • https://sasalidayanisma.org/uploads/file/76697247847.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606fde3fd240a---78034403151.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c5076aac---99904059399.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f21b523a94---58418621316.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b0852d70---sugovunis.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe8f0d0c53---woxefulikewu.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0392bd0f---zudik.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7e25863b---xabapixegoba.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089dfaa0e8b2---nesufab.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/af46f7c1fee9c2cfecbc3ddf6565d283/84084886531.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/dcceam00rekkggd6pqsnp8ttmt/gamajilexoku.pdf
    • http://iphysiology.ru/upload/dufilewomizidok.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607601002796c---selizivuwe.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/3081aff7100cecce607197b405e61bb4/fezebupufixedir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=domain+and+range+mathworksheets4kids+key
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0e.bin
d3657bf254d01a735335ed20c51e57504b8f2a1f73db4a96224b14761295997b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0E 5552 bytes
font_01_sfnt_off0000ddeb.bin
ed51e636d5d180f5462e6ee486e1b0759edc50a90f7f6588b3b22ad026c1e8f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 9868 bytes