Malicious PDF — malware analysis report

Static analysis result for SHA-256 817affc7eca8a3b0…

MALICIOUS

PDF

84.0 KB Created: 2021-07-06 12:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 717dea1f5aad4aaf98d10de469f4c7f6 SHA-1: 98754366a1a89b4ce252bdd41dd7a2cd58ae8755 SHA-256: 817affc7eca8a3b047aa16cd08aec236371b68712926021f3603cf364473dd7e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=for+those+he+predestined+he+also+foreknew
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65cada6426---16930243953.pdf
    • http://beergolfers.com/blog/images/file/69533027961.pdf
    • http://stlnsk.ru/uploads/file/7361118153.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/a287a74e82745170cb8794f16c3e7dff/lonegulojevesado.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/0nqgs42eo1rvp93mt8fqo938td/10297797465.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d51e64719---tinogiwusotiloxodeg.pdf
    • http://157.230.241.115/image/upload/File/28451315635.pdf
    • http://bhavalaya.org/ckfinder/userfiles/files/87977048530.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/xumeg.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-5-14/20210514201445562042.pdf
    • http://resetimpianti.it/reset/public/file/70601030944.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/94563656507.pdf
    • http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/pasoresakojikujunujoxe.pdf
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/bqs4pegaj85ubh576p17v8j0kd/68135845800.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/3260717ed0a0001ef0439d77a2b1742c/bipabi.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/95490238645.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f80f184ff3---88737942772.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/s970s7tb1l3ds911d8s0jrod22/nesovotu.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/zugaraxofewogaf.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb29de2b35---51403209850.pdf
    • http://blevy.com/ckfinder/userfiles/files/lukojeseboximewumevefuxi.pdf
    • http://clinicaveterinariamontecchia.com/userfiles/files/litorobumopopuwa.pdf
    • http://laros.cz/UserFiles/file/55714930190.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cea7229430---gerasirix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a0.bin
6fb6e288759fe0e7025bb63bc65c3e9f8685def8579309e166166630b1facde2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 16440 bytes
font_01_sfnt_off00010fe0.bin
32d9b71d6239868bd69635e72ee4a8ef82ba0fb34bc6a8aa04dcf19350a95818
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE0 10752 bytes
font_02_sfnt_off00012890.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12890 16792 bytes