Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dec118f91170363…

MALICIOUS

PDF

158.6 KB Created: 2021-06-30 21:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: deab5cf40c05cc3a3bde6541766a62ec SHA-1: 3c09bb88046b703eef5955b8ba14b155aed16c3b SHA-256: 0dec118f9117036350d0ff38ce59f5195767d4776df07faa438bc8ac43b50c2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a0184c0fd---76296232437.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c4a375443ce689c792c047102751f89b/44015121346.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/babofijuzumosofuvoj.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/67747750872.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d5e245634072b0349243049368a9422/jozopodal.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/96876470766.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/f8b0802e3bcee8b901f1051144c83d22/34611184390.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/337af16b4c7ff59bfdc6fe7ca0d0ca0a/53126594840.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3f4658fe---wafufujis.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091b64bd799b---somekiparaxidojolokipam.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/49847550464.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6a051acf---93664817211.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/594a614c2bda4fb71954be4c1c0869b7/kuvorizil.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/89126055667.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/pulid.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/wivulupojikakuwawel.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/aadce81d32948a676071bb793c3a6701/52365005811.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3e81a0787d58cb2b5e3ca0ff4b6fc684/13311288992.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160907fe25fada---kaxenufoxiwiraserovelipoj.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/lapafako.pdfIn PDF document text
    • http://atomleasing.ru/media/File/jegalizufotuforasomisi.pdfIn PDF document text
    • http://fluellensoflandreth.com/clients/b/bf/bfbe38bd58d8cb8bd08b82175287e3b3/File/valabesora.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/wuranufujubenevijigaboto.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/072151004545.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/391uk34tq86dskobdi1smurc0m/95956822413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=conservatives+are+stupidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B48 17928 bytes
SHA-256: 966652e94af7b18c4cf2a4e2966313507a3249ae6969f2cb7d5eac5866fdc308
font_01_sfnt_off00023aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23AA1 10536 bytes
SHA-256: f559988b02e8ce93759cc42d53868d43e2782b6cac05dc067f40f82d4558c544
font_02_sfnt_off000252cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x252CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1