Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e054d03bb7b5c84…

MALICIOUS

PDF

92.4 KB Created: 2021-08-17 22:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4c0f9a0deb192cca5359a13a512ea6c6 SHA-1: 828f10a1903be60708495db3afb38ae214f306ff SHA-256: 8e054d03bb7b5c84f46b66d8bb0951aaadf495e40a5ab44923d13b8e0d633388
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://thegioimaychaybo.com/app/webroot/uploads/files/29447494024.pdf In PDF document text
    • https://mimpi1pusat.com/contents//files/soxujerixitulemixigokebom.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/poroxusudugasu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/19605e29096e49c0f48ea63a22196ac4/86814389262.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/30ecda49p0211fhbt7vmdh0llk/10477949623.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fac5290bd1---29752168099.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/jawebo.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210709142205436.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/53955099912.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/tovomumalinowofugi.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/jivalezitafaveron.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/tukudimizegem.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/h893ouu71kvfnentonc992g26h/56275996632.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759a15b21ea---ruxosagowumebosoker.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/anh3lo7jh8lt6c3ja7piioh4kn/wimepakubexobisozujazozus.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/12359186352.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/51562958682.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3aa645afea---digiperolu.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/27842960520.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/lojegaxelo.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ddcc7d964---julixolab.pdfIn PDF document text
    • https://tavio.ru/files/file/2856351474.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f292cf242d8f653883d30c3f133bba6e/tasebadozoxejigikapanaves.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d741ca7e---84321715535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=shadow+and+bone+tv+series+endingPDF 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_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 17200 bytes
SHA-256: ae86769bd63dd53765f6a463b8037c0151750a81e028782dab1487180bd88798
font_01_sfnt_off0001322d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A44 10848 bytes
SHA-256: 6565fdffa6668aea9fd0ff669b2268027397e011d543e75fce747e68a108e879