Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e485917c60e41e…

MALICIOUS

PDF

90.3 KB Created: 2021-07-26 00:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3e0abc9b14f368b57ed76992a9c51d67 SHA-1: 4e1501c3b9a18040c214da979204548e126bdd44 SHA-256: 89e485917c60e41ef45cb3d4c97559296f5bac210ee5d10e1e6ecf428221a867
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to compromised WordPress sites, suggesting a link farm used to distribute malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to evade security scanning. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/ad05367b775745ccf783feff65bcbe62/wawarigiwewedejoniwogotid.pdf In PDF document text
    • https://dailyiat.com/html_upload/file/82757260793.pdfIn PDF document text
    • https://werbemittelag.chupload/file/59970863773.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/94701636500.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/a3e0e64c19207cf3fbff77d0eb415d4b/20899450609.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/68655888016.pdfIn PDF document text
    • http://envigest.cz/upload/file/57631075012.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/b20abd8bbc32499320436c818bf00a5a/vuxuzesakorutadagomi.pdfIn PDF document text
    • http://fittbike.hu/files/file/luwizomutazewovaj.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/dimegarenoberidumadozime.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/73730226771.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ac4e5272---39239471418.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/xudonodizemavemifevisaxa.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98b3344e31---werujegelaxisoxemufo.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/31877028994.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/c7493b12a893b8f13291ddb72c4ebc02/wativipilajagovefax.pdfIn PDF document text
    • https://tl-systems.hu/files/files/41395851251.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/zamega.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/tugitifobawita.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/31629679963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=libro+del+maestro+telesecundaria+tercer+grado+matematicas+volumen+2+contestadoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 16252 bytes
SHA-256: 6d568972154aa9e6553788066da68fe6d5b0b58db67a92e881fdc4c3770f4e1b
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 11096 bytes
SHA-256: c07b03412c8ec164412c9f4d4fdcc5aa61cfd85642b4cfa3ef8052e11efaa35a
font_02_sfnt_off0001131a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 17396 bytes
SHA-256: a253fc48571fb92662cfa71f06b6895af686d543f0589c58b187228408c0a8ee
font_03_sfnt_off00013f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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