Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff79afee2f1e5bb…

MALICIOUS

PDF

105.2 KB Created: 2021-06-30 14:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 29b6b28588482414cc471c28b442d8f7 SHA-1: 750403a170c01a09aec65a820fdfe92878599cc2 SHA-256: 5ff79afee2f1e5bbb296ff4377a4546d18051c2474af2ea17cac6fdf667e13b5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10eec56b77---xefekerazubapumojipovukak.pdf In PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24545b4358---pedidufozokarati.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f824551846c8f6c1f047bf001c03b29b/nuwoxobobepanagotoropi.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/nolijiw.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/90945088474.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec79fb5fe2---xofonaforux.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2d33c8d85378397aba4618f8c4e240f6/92264166793.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087523894d0b---25905830703.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tobijabozolil.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/6c9d05d861b48aa44b294ae722fe2827/kokegusesuvipi.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15e6a76b3c---45011829456.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/xidasagaretesazowuxefa.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/74206130768.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zuligum.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/61304676770.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6c677d48c---bepogot.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/93a66ede7f7c9766f5dd7af618f7e8da/95479504961.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/57008888959.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/mojegosuni.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/nuzofekokewutoje.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/k05i88vssehs9c14be9j5dgol3/67199418207.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec0bfc4d02---87939882733.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0234620f0---xopesalowirisaful.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+max+out+feebas+beautyPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 2416 bytes
SHA-256: 10b706c2e74070c0070b6f66f353859fc39e8630727869b8f47973bb6282417d
font_01_sfnt_off000120c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C9 18128 bytes
SHA-256: 061ae816437b93a864a4514a21be6f11340009e65f23cd9cf0067a82e00c8315
font_02_sfnt_off00015088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15088 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001689f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1689F 10564 bytes
SHA-256: 5d50742181ffcd76a066649c028bc11fa33692167b7bcc6f3197a41e5a4ec4d8
font_04_sfnt_off000180de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180DE 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8

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