Malicious PDF — malware analysis report

Static analysis result for SHA-256 169cd919a9ac199a…

MALICIOUS

PDF

85.2 KB Created: 2021-08-19 17:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b0ddaaa2da634fc3b0a2d5d9be295ac8 SHA-1: 84f7d7f2573eae6056859de14354f298591399c0 SHA-256: 169cd919a9ac199a6cd766d7691b1ead13d6d21bc57621bbe5167ec5036e2890
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, offering no direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16099840933210---xifusamepekoluv.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1b29ef237d4d2a8e006301566ec78f08/telotoludoxupen.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/c82c8a25f7e49c9fe092fec444b15dc1/36466424016.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f8fbd3a85---mavobixezufawadajilulux.pdfIn PDF document text
    • http://www.netcorp.hu/data/editorfile/58648022228.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/37001703130.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/fekubebasorumesokajola.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2181311b6a---fedidefum.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/2424426293.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/zejitafuxonelukipibiw.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/bagimeguwolob.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba87fd6384b---durojefajukas.pdfIn PDF document text
    • http://abnicum.ru/files/file/34310681992.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/jofoxetafovu.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/b5h06lh73i5og6rr35ra5tq4i6/zuzuxemigebemuzonuwig.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/13809786843.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161130fa965699---nisowenepizupipedaw.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/73083827024.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bfa833390c3fab1a2a23e27ad81872be/petoniboka.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609828361e960---mefuvodoxevun.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/kaxiza.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dc54c67a1---97939455024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=como+trenzar+el+cabello+paso+a+pasoPDF 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_off0000e6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 10676 bytes
SHA-256: 448da3881eb33837eedd38b0502f8e04632950a722b425bf1df085d38268f188
font_01_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 18076 bytes
SHA-256: 9109fc353b5864fbbc01f73092d271dba618be800a3463ed92af9b5128e0b0d2
font_02_sfnt_off00012c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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