Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f5434e3889add2…

MALICIOUS

PDF

83.6 KB Created: 2021-06-14 15:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aa06207215931f6e3bc79d7df04440a SHA-1: 892f03f531e953aced903208ae0b12a2a318194a SHA-256: e0f5434e3889add2c4e8e881c328a634ae8cb9080b2326b3e3b458c1d6f0d3b0
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8432

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=ghd+live+tv
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab46446c7---85634945611.pdf
    • http://mistral-paints.cz/userfiles/files/29430095309.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaabd05340---vuzes.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/g60v7lhhdaacklhl5rkn6tpomt/piwudimixarodelopela.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073fbef43240---37374523050.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a011107e49b---3809697414.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/483171c4b2e42dd3d74cc5819e23fae0/pozadadugonizalosixoneki.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eefded2a88---49465180077.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/hb121jidg1d4v3gke0oj65ph6a/7718058398.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/1oel05gcgc3ee2t01kt5fjbbp8/viximagawufe.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b939e1b36---69230597130.pdf
    • http://aire-limpio.com/img/editor/file/tugevubafilud.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fccc9ebe2a4c03d920cee6a2aa035dc2/15829384540.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/805f818fe5afc8f4842e750fdf1734d8/59930801003.pdf
    • http://barbusci.it/maisUserFile/file/64352565192.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c33abeb146---78465257271.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c453165b93e---50859969968.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a3732b6---dukudalodojigamipesolor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d3.bin
4455747fda9ac97410526ac3fee3ca643cc61cb592146befb7df79af2604d95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 6424 bytes
font_01_sfnt_off000106b5.bin
a94ef218c4f9f095cae57a2150169e8dc3de5cacb260eed683adc2d6ec56490c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 4520 bytes
font_02_sfnt_off0001161b.bin
9e38d0db8ceb464b2cdeafeb4dc8ebe1ff6d43581cc2f57e1b91007072c39605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 11752 bytes

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