Malicious PDF — malware analysis report

Static analysis result for SHA-256 589e9e4dacc65218…

MALICIOUS

PDF

94.3 KB Created: 2021-08-09 16:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7c73b4d9cdcb05a25243a24412b000d4 SHA-1: 01b723c8835536e1508bd35cac0b079a033f4c64 SHA-256: 589e9e4dacc65218f4b83193147f0be593fec2372ad6de189b85d06453e58362
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm patterns, directing users to various domains, some of which appear to be compromised CMS uploads. The primary function seems to be redirecting users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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 https://drafthe.ru/uplcv?utm_term=visual+code+install+extension+manually PDF link annotation
    • http://1careglobal.com/upload/files/17133388849.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/jofopa.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/degemaravuxovakazefaselim.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105780e94b25---43259478274.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/tojiwusidis.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/2a3bb2dc6328004b085acde2d1a3ef21/16452070400.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/jafubejazajapakegen.pdfIn PDF document text
    • https://jurad.eu/files/file/joturinepudizufomelos.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/menafuzikemuwugu.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/1406557191.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/buxopapexibitubefivole.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0231d11cc1---50712354463.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/52084081818.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/63264176738.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/vuzuvakuzi.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/fewerotadotawowotoxi.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/74343861055.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/83817171353.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/49094514168.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d174845c79900ba60cd4b79366298f42/keluvevomegexefozut.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/zepuzelino.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/18915183635.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/55118036160.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bad37156b---pavipawesuneralifafunur.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/robuma.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/tumaxagabevogulegura.pdfIn PDF document text
    • 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_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6B 10716 bytes
SHA-256: 2045112115b96157a49ca8d775c8ecbbeb2fb72d7a47fe88a4232ed56ff3a91d
font_02_sfnt_off00012611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12611 17676 bytes
SHA-256: 68ff2b6238cf8b0668b329fe748d757782a671d0006b8c7d19d5281b75816306
font_03_sfnt_off000154ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154AE 16180 bytes
SHA-256: a1c4f00b8f3a7dd184b5e41c70ad30299ddf0e1c0f9901f74a285f91188d9b14

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