Malicious PDF — malware analysis report

Static analysis result for SHA-256 705f613424f6fdd5…

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 14:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7b22968062234ae57b3b243d8761d4cb SHA-1: 87f4023c56f523f5b77fc363e8c9289b5c396c80 SHA-256: 705f613424f6fdd5782790b53af4c7be110c6b95166beded5281fe57a9473003
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and a machine learning classifier. It functions as a link farm, directing users to download a password-protected archive, a common tactic to bypass gateway security. The embedded URLs point to compromised WordPress sites, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/uplcv?utm_term=android+file+manager+root+access PDF link annotation
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/5f16f35b113617d8a1e8be9039cdd0f0/66870371401.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/lizofiliwutuwuz.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/28462147560.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc16f3f82---46999481378.pdfIn PDF document text
    • https://tdfstore.it/file/waketa.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/28c6101372ed5d3912f516b33bba7095/jidawere.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7592ef79793b506c24a22333f5a4ec21/196348086.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/gajuzoraliwaranipelobuwu.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160945c4a54c8a---60711374815.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6ac0ecc82---99686894734.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d22ca3746fac7c9a322085dc59554ad4/27361451447.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/c0d8ad73b22c5af0ffeb0097ba790260/52776209935.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928295c1efc---wefonegexome.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/79158603094.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/sisijivajepis.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/5e1c26b422e1868f80a1bd51681f1067/likizagunedasigowubalewiz.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/22942656046.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4b9b4e6bfd42382b91583e0b23857057/42382345649.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/30c56bf795c44574c7be55cd2e05cb18/79581758874.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/qu49tt1t50b3ukr11ot9lcjrf0/81474708137.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/04b78bda606bbbc8ab79b447747e28cc/vavibutikunorasexaxe.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608130ffc924b---lozefakega.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qg7rfk7crr6ajd7vkljrufunch/59551436822.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a633cabc1---ninejolowarukukalujur.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/76577828877.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/6f0c88c43c432ec57334cbc119f30dbe/xovodajinagilesubele.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_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 17088 bytes
SHA-256: 09249feeeffcd31b3706080f0c00371c12c61e4d7fc38089897c29ec7d7cb1cc
font_01_sfnt_off000129d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D1 10800 bytes
SHA-256: 8c93f2d014ade2ada80b1e7bf55584c83894611ab3104155678acbfc0e1c4889
font_02_sfnt_off0001427f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8C 1668 bytes
SHA-256: 0a4af374cb035e676210909e4790276a619635896d879aefac6ffd5912e9aefa