Malicious PDF — malware analysis report

Static analysis result for SHA-256 30be6e2f9e180e68…

MALICIOUS

PDF

85.2 KB Created: 2021-07-17 02:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4afe462a1113e3fed75632bce4eb9d05 SHA-1: 322fe6e8018c9ba67b720ece371c626a93ea7543 SHA-256: 30be6e2f9e180e6851f13212fc9f2f9fbee097016ab4c9532ba404ef515b52d4
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, with numerous URLs pointing to external sites. Several of these URLs are hosted on compromised WordPress upload storage, indicating a potential distribution point for malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://shelton1961.com/clients/35589/File/vawukigexu.pdf In PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ef801a1c5---temepubuwof.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/15033871220.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3a2e08888b5de805d381a395d4008522/36657817243.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/mmkefgbgke3vpliarpq2r0uh9q/47592756660.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/69276809208.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/593sf5us1tvma95pnvi01h9ogj/76837217165.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/xuzezagu.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a9c64f27802f9e5088387e05e9cc3b32/jinusi.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/69874400120.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/xinetumuxerariged.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160965153d2ba0---jeninezotatotosak.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03a1ea023---19245166187.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/57757616960.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b388142ce---furuvotebazivabigum.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052513220276.pdfIn PDF document text
    • http://jejuecotech.com/ckupload/files/wabosijebufekaxared.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/vopisudiluxugidomesewiba.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/mutazuninepedidoxamabe.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8d68f504---52352601302.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0a2102b16c84f255ac962187ff57dd85/foguxulakuvatedajir.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b1f013ac0---gexujama.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/91548835356.pdfIn PDF document text
    • https://actor-conseil.com/files/file/xidunuwogupisus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hcf+of+42+72+and+108+by+continued+division+methodPDF 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_off0000e73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 11636 bytes
SHA-256: d7f602a71edea42a0186f16ccd383cc08fce979f1fa2b20044449fa3da6be6a3
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B02 16900 bytes
SHA-256: d983007197c07316538a1bce183a7f88fd4cc184c0eaf63076101d5916804559