Malicious PDF — malware analysis report

Static analysis result for SHA-256 f804315284f61e37…

MALICIOUS

PDF

75.2 KB Created: 2021-09-07 04:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 93d0b5c311d9970a4be3adae8fdcb45b SHA-1: caed2e77607603530f72481f00dfdae23b87e717 SHA-256: f804315284f61e378ed41a65e5f8a8ec3ef2dd70c6264e921cd91e8ac04dca0e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious destinations for phishing or malware downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crewmak.ru/uplcv?utm_term=manual+de+calidad+iso+14001 PDF link annotation
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fb2b01dfe88c14071e112cee7759377a/butezutikajalodulebavit.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5b7b6d16c928fdd71566cc8541066d58/fonugilokarorerivus.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/8c30a0f5770fb28ff4ad610ddc62175e/poguxaliz.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/85728344866.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210810_03045ECF91BEBFF6.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/ravuridobo.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/videwaneles.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613574bab06ac---92976000673.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/30321828181.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9846378a1---27448397512.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f92b13773b3f51e5cde80e49f524888d/27940809256.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/47451630749.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c25c5b6643---depavawigoliduvakunew.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/61aea43e4681d4c1c88ca13f79efbd3f/2902095036.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents//files/sikeziwikudobovedilubo.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/ruvigolenofoxi.pdfIn PDF document text
    • http://dalaichau.com/files/laresasirimisenepa.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9abb58d96d---dotagudozebanalesizuj.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/13963942873.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f6a6c322caf08178af614f97fbad7541/82642727396.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/61103457558.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/52594762887.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/93447255088.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC589 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 16028 bytes
SHA-256: 92868a42e29f09e079057c9e14490f0d5f48fe778234d55527cdb3def05444e7
font_02_sfnt_off00010582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10582 10512 bytes
SHA-256: cc0b9e76666cc7e7b8533be4900424a9bc73bb44017f27505badd231b780dddc

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