Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee92c1b6a8c77236…

MALICIOUS

PDF

79.2 KB Created: 2021-09-06 04:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8fb743b6cc709fb87e988190a8075b96 SHA-1: d640a4289d226321892a983e65fc3c0ebe9939a8 SHA-256: ee92c1b6a8c7723640972154d89d99224224ccbb0c35819d189e798ed98c1469
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of an IP address literal in a URI and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. No scripts were extracted, but the structure and URL analysis are sufficient to infer malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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 http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610612905cdc1---demejosib.pdf In PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc7449f07---poneboravipuvonakeruwa.pdfIn PDF document text
    • http://abnicum.com/files/file/vozofafa.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/mazepavopuwilala.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/7d6e5d85df3ad6ff58b1a277faef1f04/75047065763.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2aefdca21---gewugisinejuwusifijawil.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/de4277192ccf1436241bc18bd3318597/patemi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c66a7602ea8---lemetawomufutizog.pdfPDF link annotation
    • http://cariboohose.com/userfiles/file/52441341578.pdfIn PDF document text
    • http://arlingtonhigh1959.com/clients/863184/File/22784961645.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/totupupedekufobagut.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/42745471949.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/taxavukisakogoniw.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160db9b0e2235b---96850548936.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/xidojibomaxapudevunojefem.pdfIn PDF document text
    • http://sam-global.ch/files/file/80055226196.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/vigezewupapage.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/jqne5v3ob0r73qtd8ia7e98duk/wulixekakiwizufefodut.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/gamuwinuga.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/66278560515.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/14622754603.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/buxomezalov.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160815a1a7c1df---91150660744.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fe250abf2---79339395314.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/2209b708ac43e69a7021461bca2f784d/68869953079.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/sevejuzoxewafuzofopuwe.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/85913734059.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160771d27c9af1---medemururijizabesedewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=constructivismo+filosofia+pdfPDF 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_off0000d047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 18068 bytes
SHA-256: 2b577582848b8e3cb6d5a63253b17de5c59d9c0956cbe9df9737df9a5ade78b5
font_01_sfnt_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 10848 bytes
SHA-256: 67cc871ef545f5fbc508eb5fce0da0b78b0a88526841dbf8c7ffc21b867613f4
font_02_sfnt_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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