Malicious PDF — malware analysis report

Static analysis result for SHA-256 02890da705130a2f…

MALICIOUS

PDF

94.9 KB Created: 2021-09-04 14:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3f74d58736463d46a466d5a963cbd29c SHA-1: 5ac272b36b93d9181ab42779365c443744553d40 SHA-256: 02890da705130a2fedbe0016464e8ba6ff732001617c185e51bfda6de2f7c174
156 Risk Score

Malware Insights

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

The file is a malicious PDF detected by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests these links are part of a link farm designed to exploit search engine optimization, likely to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://destockbaby.com/ckfinder/userfiles/files/tewamenabavezeleropok.pdf In PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/xewilexadarokolejepurup.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/8771693af0bded706ba80d87e6de4eea/56163849672.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/zogumopaxarasaferemazazu.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/64504778721.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ea4bea55d1a5d0131b8c4269937414aa/77887967235.pdfIn PDF document text
    • https://medtek.vn/storage/file/mutesimanudepum.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d0e9da6ed---19076558505.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866125328f7---14530087587.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/kasabovamorise.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077669078725---xamifirorubovaget.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5694fe8c92---sipomasexumajoxel.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/2684782600.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6ded14949---12940079070.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b1e6aa10e43cb076dec257551827d763/tebizemiziwegom.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/7d40c79cef185cb92e0081eb1875bd35/pujejikilemofo.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/b225f774e9e250d39368fdee5e435153/55072306775.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/zorofuva.pdfIn PDF document text
    • http://holzweiss.at/34443908101.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2be6fd26c2---bogiviludixomunozi.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/50020d1fc95a6c9b00d1f8825643bd20/ninoxasogogi.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e42839f0f3c---bibobu.pdfIn PDF document text
    • http://kimthienbao.com/userfiles/file/2120269497.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/27f4ed431be553c07cee1854051d3e17/622327044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=conservation+of+mass+worksheet+middle+schoolPDF 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_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 19256 bytes
SHA-256: 85f306d6aa33a4ddf6ef265da90e16281a87c56ad115b2e3700c04c57c765776
font_02_sfnt_off000154a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A7 11016 bytes
SHA-256: d990741c820086c5c44862a4f0c2521e6d4608e3a1c853506bd6ab2e84e83ca6

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