Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f3256d02d2ffda…

MALICIOUS

PDF

75.1 KB Created: 2021-09-16 20:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56165bfddcff8f17da9e8a8a46354aac SHA-1: ec9717609cee444cf70c6fcbc113e54f28695819 SHA-256: 76f3256d02d2ffda5fb7acfd0ee8f57a2f696a09b1d3de26ae543b91a52c63dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm hosted on compromised CMS uploads. While no executable scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. The presence of multiple links on potentially compromised domains supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fijiembajak.com/uploads/ck_uploads/files/digezegosobimafilagud.pdf In PDF document text
    • http://skpizzasubs.com/uploads/files/rajokujerimekolunudikaxuz.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/82104404100.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/falovejuj.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/sixorovusuwixadurepilar.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/25325054196.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/32735234491.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/2953476080.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/zinezowo.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/5f716e75f636941f772eb2637152e6f5/26566321134.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/lazojagu.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/wefipipexag.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16134c03ed4f22---55411520011.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/lakeson.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/kezaxekutonuruferaz.pdfIn PDF document text
    • http://mebco.ru/images/file/10906764833.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/fipefumuzetijakerit.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/29054153324.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/sitisisavobenuboxagorose.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f848b66ee0---12442336089.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/22176547836.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/4bds5dfr62gl48no853kufq705/mewed.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/degebejixukum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=fan+full+movie+onlinePDF 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_off0000beed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD704 10152 bytes
SHA-256: 09c9af3c9092595f992fdcf1334052310c72bb18c9a913f80a1d71e51ad0f6de
font_02_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 18856 bytes
SHA-256: fbc2c651f59b6f47a40b5efc018196e8d8a495740204307868a16679c940334a

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