Malicious PDF — malware analysis report

Static analysis result for SHA-256 db094df9f7d624c9…

MALICIOUS

PDF

84.5 KB Created: 2021-09-19 16:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c1233b8ba04158cafd87b1467fdc3439 SHA-1: 4290ffa0331db1cf48f9100c67a2fa369096eec9 SHA-256: db094df9f7d624c9e1351e7ac78551d27e1e38637fd98a46aba0c2b8cb11722f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://centronegozi.com/public/finivozura.pdf In PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/20900972436.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/dijali.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/supezivapedalef.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/roloj.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/16809620478.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a6cae43fb03dbf3533d0f478cd9a7df2/solusakosemujaru.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/cc85bad7e38c32b50800228973294b32/dafibefavarejamemaminap.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4f527c2a7---vawuvit.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/togukupof.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/fejopotikolinugir.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/wuvivid.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02adaf409---buwodezodipu.pdfIn PDF document text
    • https://suacuasathcm.com/uploads/files/19587392768.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4d420818b---gegozabiruwixibebojodas.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/63867911944.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/14391907035.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/lelowimiwuvisidajesodemu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/35430114220.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/46764201884.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/vuzenuzosozovi.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/26575720341.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/gorudem.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/kikukonoluloxibamepemozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+follow+private+account+without+requestPDF 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_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 17872 bytes
SHA-256: a744a400a06dc63ca546ba97891a879d59c2745d7d40ec67f514345cbbccc80d
font_01_sfnt_off00011222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11222 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 10968 bytes
SHA-256: 3c4e6497c27a2a2bf0d96371606d6b4466e9ea813f233d30c6326a3ac126641a