Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b1be8c3465ba54…

MALICIOUS

PDF

115.3 KB Created: 2021-08-28 21:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f5dbcfe1343170bd8d81bdb4ec6da169 SHA-1: 577b0071122379ee89f49271ffef6d45ebc9fa3c SHA-256: e5b1be8c3465ba54f31652adef91d400c52a22abf4537d04b88495f83795fc8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://drironcat.com/images/file/86346658587.pdf In PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021082316322673499.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a869a66fd3---79421110881.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085151ec51be---24916999427.pdfIn PDF document text
    • https://bczenekar.hu/files/file/sufewobox.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/mukobivivavesobowezudik.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021081021592373499.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/ludisegujujegebite.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160701a21b9390---wumasakejuvanaripegis.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/51323771177.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/woborosiwimubupexatazek.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/6heuq7q0n89vmtmg2ree84dpa5/tujekugadiw.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a7011203c---33754713964.pdfIn PDF document text
    • http://surtek.biz/image/files/20150225_120537.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/vobuposesuriz.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/piriluvof.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f5751ee20---48585747864.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/jofunepokizuvonivabez.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/guvefolejugabikavatakofa.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/rikezunowugodepatiri.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/14afa20162a9341f8c30d490443a3d8d/81746820344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+beautyful+ones+are+not+yet+born+pdfPDF 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_off00015e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E40 18624 bytes
SHA-256: 752c0f9bd52df751c0544392e497a7f8e6921907d36ce5335c19ece649fe7dd0
font_01_sfnt_off00018eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EAE 10820 bytes
SHA-256: cf55bb20a0c67c05a2d8949cd3f4ea69bfdea4c9516056ca4119a1c5f4e4a925
font_02_sfnt_off0001a773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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