Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb012c0b9cf6a5b…

MALICIOUS

PDF

78.0 KB Created: 2021-06-01 01:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27cf83eb909a149fa308aadc1a9527c3 SHA-1: c514da665909a445627d8d1ab2f1a93a1181b19a SHA-256: eeb012c0b9cf6a5b260592394023b5b4c0c2d8b42870ef09c7a6c8ba15e8a361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malware. The document's structure and embedded URLs suggest it's designed to lure users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5a4aed466---zemuwazakitigerigune.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f533b1ade1---50913442895.pdf
    • http://bygreenpure.com/userfiles/file/69321520948.pdf
    • http://gtlmarinefuel.com/userfiles/file/zijotijedaxusa.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8b196qu1ppj7qeum0t9ikj8e60/zapupurafinomemuvinajewa.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/93c4773fc58b7a8549a475aa4c255944/donisepikunabofod.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9303e04bde99c64ccb8895ff2732a07a/75221249619.pdf
    • https://audreyheselmans.com/_files/file/sivatojudufaxix.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/17a58f8df991ca48cc706848907972b8/jafonitose.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e33e1b3959---rarupopizujenafawajupajo.pdf
    • https://alshamiltrading.com/alshamilfiles/file/lumotevewilexo.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a510c619b0c03e9a9e942d06898e26ae/41921159953.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23101bea75---60861707090.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2c6742b45---76563995604.pdf
    • http://www.deopendeur.org/imgUser/file/burojogasozemitojedi.pdf
    • http://computerdoki.hu/user/file/96359567736.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e0fac7c199e1fcafc7ef7713379c7e3f/zoxikagum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pork+on+hcg+phase+2
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6dd.bin
05ef07341633bae9cae1a521a4ab0a729732a267e1271ea543ae23a0b90dfb70
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DD 5020 bytes
font_01_sfnt_off0000f7d3.bin
9a55eb3e3bf62757b2870044b617274c0a350011f880635b904a77023a20ed46
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 10888 bytes
font_02_sfnt_off00011d11.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D11 4324 bytes