Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3722c25f5f1ad1…

MALICIOUS

PDF

98.9 KB Created: 2021-07-07 21:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02ae13fbd03ccce5e6ad228b5cffcec0 SHA-1: b1b96679adfb670c13055eb29532faa3b3eb36ef SHA-256: ed3722c25f5f1ad1f28c1d1dae66a7bcf1fc41ec48ecbdbfe3be58f3a7ca0418
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or redirection scheme. The presence of a link farm and the use of compromised CMS uploads are common tactics for distributing malware or leading users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://pnlcoach.com/misc2/file/ In PDF document text
    • https://ludifrance.fr/userfiles/file/ratenudilulabiwifo.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/28295364119.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8980f76ae7a35bf5efa4843f3bf6139f/norelaxixonam.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a602dc4f199---ditufafeluzilosumifuwis.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c27e287f3a8---rotobupexotosomumofa.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c8ebb1f867b2fd139e1a9e331e7eb5d6/6061903109.pdfIn PDF document text
    • https://ivanamihic.com//files/bapod.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/vavisokad.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160809cda3ccce---zekeg.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/fukoliwexebi.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ba754be2997---30457465200.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/ludewew.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4861fca416---meserewe.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/0f3bddd1884ed2439891b8f18f06796f/32785161410.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/7be7daf21f3d73e6dfac0decbec4b8bd/junojezurixamumu.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v83c4e689k010hck2jsjqi29uj/40604079640.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/liguwupo.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160badc2184f4c---piboxidusupudanafaw.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jereb.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/gebugidetuzifobomogulek.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f026f3c013f1e4547cf29a6a6a33bbc6/fezosojonoxaxemagisa.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097cd897ac57---70855392582.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/6733012402.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af59ad0c4c6---xawexubazudefatugolefaji.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/020e74d6478f805c887499b411b7ccf1/19007643187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=open+innovation+model+examplesPDF 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_off00012120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12120 10648 bytes
SHA-256: bcd619e8c2a5963de472818c930d5b31f13619ce5016764b5396a61db18abf95
font_01_sfnt_off0001398f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000151a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A1 17244 bytes
SHA-256: 620e807d7b3091f0d47883027b89bf638336af142aa1339c01200ed90e1355b0