Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ac92811ed6752a…

MALICIOUS

PDF

91.7 KB Created: 2021-09-12 11:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ff8ff32b3a674019f8fcbda1b93cfb8e SHA-1: 5cee98d616a726f4a241cf20cee63c1a99601183 SHA-256: 70ac92811ed6752acbc17a58b35cb8fe9516f865de10eece5ed750a68a9eb3ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://coolingrealestate.com/your-home-cleaner/FCKuploads/file/tujusejoxadasumotu.pdf In PDF document text
    • http://hk-bbc.com/upload/file/74119075425.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/wutunajiwedun.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///gugexoruzekajoj.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335867b8ed0---81108009693.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/fasezok.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/34357022867.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/7263569704.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/61489757195.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b33d661367---lenuworenoxuwogomisek.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/baveramijuxubelubinow.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/87262965814.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/10554646101.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/fokemuragusoromodonu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/33264d857ce81ffb2ce633dde4a3344d/19927401202.pdfIn PDF document text
    • https://granitnet.hu/editor_up/85591899873.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/61451689956.pdfIn PDF document text
    • https://retta-bg.com/userfiles/44934147942.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/posiduzivikigovu.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/kitorexuduripufidoj.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/sexuxaba.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/zibuxem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pokemon+digimon+fire+red+gba+downloadPDF 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_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 10748 bytes
SHA-256: bacd810e073e32c181c450806518f42af4b7903983e5a3f9dd972bdfe55750a0
font_01_sfnt_off0001166f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166F 19372 bytes
SHA-256: ce55b369b9d8847abc122e44a4ffb457cc7edb410dabe15e6dc10c7e0bedba07
font_02_sfnt_off00014931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1