Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced70061f8860030…

MALICIOUS

PDF

90.0 KB Created: 2021-08-01 18:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 96cefe349d19b5de37ac4e3479d12739 SHA-1: 28a8e0570024db8b8a665928964f5945f60ef264 SHA-256: ced70061f88600308a0b1eefed02e5c637fe56bd531f52e47d54131c119cac01
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload directories and disposable hosting sites. These links likely lead to phishing pages or further malware downloads, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22895a9759---47422296245.pdf In PDF document text
    • http://gloria-eurex.com/images/blog//file/domomusufo.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/bcbb10a191dd944acdb5651a5863a8fe/5146616416.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4b1828c6a---viliz.pdfIn PDF document text
    • http://quatang3t.com/upload/files/pavunomerini.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/bt2okk9nhbtv6evim69u1su0tf/96629092576.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/32645502370.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/57310461132.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ph4iu2a82bgf2i9k243qfhn154/nutewagemilimefananabaxi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0icsgifp87qr5f0qjjggio2t72/65014609543.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/nozotudi.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/81792833046.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93c2b61e90---satujuwufu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/te8ncjpnq8r270r5u8knd3ptf6/45860556407.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/gopetijoben.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f1aafc5c26b18455d5d0b9398446c34f/lufitinixinevanefife.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/29418189643.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/91230574080.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/96211708637.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9b333bf52---68322456336.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/36674104156.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/16276085793.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/6b0933ebc520425e6f73445bcbeb0ef6/41944613391.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/5nfm8s1kje86p41e1n8j2mprm0/6121014365.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/omo40dfpan5lm7k0g6ifjikg4i/85011587454.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/87ad7b77010ab6a6b4ff75163513bc15/776072423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=joining+report+after+leave+samplePDF 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_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 16964 bytes
SHA-256: b494a3da2cdb2dec521a3700e740d4f4b23844a18a286224f16a1415ef4997f9
font_01_sfnt_off000128eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14102 10756 bytes
SHA-256: b0dcb8ecc90478001711f16a3135d805b05a72cc67c19533bef8d457140675c2