Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2393c44efeff8ae…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 00:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b54fc29eb8ce152afc1150d4b6588110 SHA-1: 08060b0700f552af5c99ecc2d8aaa8bc743fa227 SHA-256: b2393c44efeff8ae2d3c91bd11e889533ec2cfbf824dda3c5ca1570aa30ff293
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised or disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://healingtown.org/userData/board/file/42158613074.pdf In PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/724289517c199af85c99999288c092fa/zijaxapuwon.pdfIn PDF document text
    • https://quangcaobienbang.vn/upload/fck/file/mawipajogetozav.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/58211543558.pdfIn PDF document text
    • http://jljemc.com/upload/files/27486592141.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/7q4vgqrsg8pennbrvukgfbpims/2715151208.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210716_E382F4800747F77E.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c54431679fd---30230245754.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/vugupuzope.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a255aeb5492---xazodibopuzemedide.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e55901c623---sewifugakasubinunatunazo.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7339246d87---41561752056.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/98778710086.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607da8462632e---zolufalok.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/caf714fa6dd2fcdc5b6d654d667fb00c/lidavevusoputapamu.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/14221883387.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/remonabejigeturijazanexes.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/35974828318.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/bifamupamodadu.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/gedosipifowudowes.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/k5nla7f90epmojks0hohk6k1cp/nexizijikajinawamavug.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1623106461.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/funadozaz.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160806e271a25a---xokunana.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/287eb61t0q2r0lj35mg1d59t6d/66041281340.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6948d2fcabd2054d5dbba0aae1afd99d/logotefoxuvenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=2007+ford+taurus+user+manualPDF 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_off0000d189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD189 16832 bytes
SHA-256: 49e8b4f15fc2aa20e29b21de16f0eaf64a159a9c4ded00e3f070e0f188dfab34
font_01_sfnt_off0000fd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD69 10716 bytes
SHA-256: 18ef1777f8949555ff0867dbb4f79870bb044a91a51ea5ec4bfbc7ac12da88f4
font_02_sfnt_off0001161f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1