Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ac43e261a0ed80…

MALICIOUS

PDF

87.6 KB Created: 2021-08-09 14:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f23f45b967c18121ea83bbc2af2b892a SHA-1: a81b8e73121be0d667ebfe64284f4e259b6d28fd SHA-256: 70ac43e261a0ed80ea3d503aa9b72a96f3443fc6f31c60708c128fea82214402
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://inwebjor.ru/uplcv?utm_term=porsche+cayenne+2017+owners+manual PDF link annotation
    • https://daquin-ferriere.fr/userfiles/file/milepuzavuvananowubopekap.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4dd45d22a---42972180471.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3s3ocnc79f3c0h5g1ve3ql2c6c/22168417639.pdfIn PDF document text
    • http://maisondequartierdespareuses.com/userfiles/file/puxakatifuwixodalig.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7b28b9249d587a1d27d146103b52067d/53458109842.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb3b538ba5---bofumovujobozik.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160718d44776f5---butarasilu.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f5065c9f76aa1f4325f415a1ab1379a9/dekagabuwodevuwevimafewil.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cacae114b8---jazaxefetakusolomumejo.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c341ad93859---gusimuz.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871934bbe39---46467681445.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3010ada2b---nopaguziginivupolosesu.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/fotakilal.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/79467588393.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a1b08688d714ba8029ae92ec6db0fa98/zitopuzix.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f9097560aacbba3d204068508612f112/11327747992.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/75730257484.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/cq5uuccrmt0ahdetaghhfspv48/21977900077.pdfIn PDF document text
    • http://mousike.it/img_ins/files/41840966721.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/82175908717.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160795165a2f90---fabevabuposomi.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/30723719882.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/22806277964.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160780d4c758ff---durufexezamelope.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/2101819957.pdfIn PDF document text
    • http://promador.pl/userfiles/file/legekagudarosovebubodik.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/38307646099.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_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 16428 bytes
SHA-256: b9cceaecec0012072294fb407d2c90dcd5f8e3452664b57e98e50580ad1be8a4
font_01_sfnt_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001369c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 10952 bytes
SHA-256: 7aadc96932b12de7bd1ec70bd048cefb8ecd58296ae9ddabb62683e4c200e9d3

Open this report in the interactive analyzer, or submit your own file for analysis.