Malicious PDF — malware analysis report

Static analysis result for SHA-256 953988b8eb7163a3…

MALICIOUS

PDF

80.6 KB Created: 2021-07-17 11:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc1aef7c8685ef066befe71848ed003f SHA-1: 70c5ad30a8c65ff8a2ad25aeb7b69d46afb6345e SHA-256: 953988b8eb7163a34fdc9873d574740f3c8a8ba56af377c8268d2203fc9e4397
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple disposable hosting sites, likely intended to obscure the true destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. No scripts were extracted, but the overall structure suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ijpdua.com/contents//files/wijujepusujuzeduworonuk.pdf
    • http://ahxxzx.com/userfiles/202105/file/14691336139.pdf
    • http://agcslohian.com/userfiles/file/gijowuz.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607119bb48ffe---35485692441.pdf
    • http://amdind.com/userfiles/file/xizevagopaniripunur.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/abb9788819e5ecd8fdbd3def4d1b3cf0/fexejizezado.pdf
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/14317864221.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc36df0a893---81775621603.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1186479d0b---wefumuwavapitixu.pdf
    • https://alrukn.co/userfiles/files/xemakobisivalo.pdf
    • http://farmaciafoglia.eu/userfiles/files/97573926533.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/27434ad165aee4491ec12109b02f354b/92097970594.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mkiatpc298h713n726p22ode5h/mimofamapagirunodubo.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/138fffplokf3comutvfkb1e61n/balunibotekuv.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b6bf696fc7be82beb466dcdd54abd02f/88402227036.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0548c8f949---wasarade.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/bc2559ec54fe02f8a9deb7cdc08db0f5/xojuva.pdf
    • http://atut-biuro.com/uploaded/file/20699628856.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/giwotexoratilelevawose.pdf
    • http://koovappadyscb.com/ckfinder/userfiles/files/fijujuridof.pdf
    • http://alpha-th.com/userfiles/file/xumazizipi.pdf
    • http://moto-bike.pl/userfiles/file/93912597253.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078725f488a9---10234869241.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=swearnet+the+movie+torrent
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a2.bin
9943de6e15d83dbf72d21da973496abbf186b94d56ba21d78b78aa16a64518ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A2 18264 bytes
font_01_sfnt_off000105f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 16792 bytes
font_02_sfnt_off00011e07.bin
09743f3c01e382d235ce40092181a98ce20540a38ec531a676e65b9dd3185f5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 10388 bytes