Malicious PDF — malware analysis report

Static analysis result for SHA-256 423098effa645308…

MALICIOUS

PDF

79.9 KB Created: 2021-06-10 03:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a4072df0a50f4e180e01c54e9953ebe SHA-1: 8379b1b43cba20c1565f04d5e84cc1239f90b313 SHA-256: 423098effa6453086601cc69a1210307c7a5e54bde4f2f1ea2863610fe7a58a6
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to compromised WordPress uploads or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URLs are highly indicative of a malicious campaign.

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://allytemp.ru/uplcv?utm_term=transcription+in+prokaryotes+and+eukaryotes+pdf
    • http://lubrifianti-auto.ro/files/file/purasexo.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59c4e9076b---4513647082.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/24aa5edc447cf8894eee8d3e3d563412/71000395674.pdf
    • https://fanaf.comarticle_ressources/file/51535700051.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/etmb0olrmh3hc4381ql736r0g7/47494754404.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/br9evta1l12mur69pqbbf5e8ip/10720481664.pdf
    • https://jxloanchien.com/style/postimage/file/segutapof.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083611bf15db---42390995592.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1348b5bae1---nesowojuj.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/6da6fa78aba3bdddd96111947578deb7/fakakivavofekideminot.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160948cd222363---37159045247.pdf
    • https://anmoul.com/userfiles/file/zusizituvamidumolurovi.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/senogezivobokekibufewo.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5168969014a88cb9c86b60fb6f7798fc/kilarilaxeletut.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/866e9089c5e2405e7336b926b710cfbd/dofewuwaru.pdf
    • http://krevue.cz/UserFiles/File/74474135111.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/riredamupisaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f6ac.bin
02bc5d5a334115be3e859999e135e4460f86c83028e637c406f69c85bd576d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 5232 bytes
font_01_sfnt_off00010897.bin
bca4abfd24c9f8eebd5aa0024457481aeeef55b0355aac203acacc39d89f0e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10897 11744 bytes

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