Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7c67f0c44731f5…

MALICIOUS

PDF

118.9 KB Created: 2021-07-13 16:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 178150dfd66c33e3f7e370de98259249 SHA-1: 902bcff7086f90bdbce66852e857f5e79bf00f03 SHA-256: 0e7c67f0c44731f5715654ba890f028f866d8a1fa544c0ed6d3b425ce8af0aa6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and numerous external links suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3828

Heuristics 5

  • 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
  • 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://archism.ru/uplcv?utm_term=showing+concern+meaning PDF link annotation
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/38ad228d90698c085bef56d847f80749/9690870920.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0603766941f99fc2d81f5f1d995092df/50098996009.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffb8a9824c---45071919776.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/b920718639889fe910e41843e31c1f6b/69845972297.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608052fb7f1e4---gudigekojimeveradofobakeb.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b4b4652aa306efb7360efdba87853ddf/nijodoxokuvasazowegovewu.pdfIn PDF document text
    • https://cubic.is/userfiles/file/dofusumu.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/62164906395.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985976e115a---xumekopimurarotepe.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db501be1e4---jotadojekojexumitezubiled.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/1o0gb5uj5iuvqdfu3a0upp84jp/24380675814.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/7ffe4f798e059446019d940c3ed6c38c/bafinalaberujujar.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/9efde4a1edbafedca53e8466e1ccb958/12228735493.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/63b281eb0334d58f8d476ce00f95fe61/bepunamu.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/74b6c8c8a70713b9cb852f25764949a8/51926442362.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/92tf0nm2a284hcv1uoocbrhilk/48746165526.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/32c0de9c76a1e0c1d585029469fbd1aa/22325390258.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c356b8a84---60691132396.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca973c05d7---38974162642.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/pexexezuxutoxiwa.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc4de206a9---wewevotakepivowopojov.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/3ecb5d571f789acf24e82f23b839321f/59801661669.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001b4bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B4BC 24148 bytes
SHA-256: f8c6e0c94bc3656d4d01141349bbfd8338757294543f70ca53888bd4dc0362f7
font_00_sfnt_off0001207f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207F 10528 bytes
SHA-256: da825ba2aef6da2b82bc5ffdf57378c3269f8b8e27158e13edd75c0a188af40b
font_01_sfnt_off0001385a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385A 7940 bytes
SHA-256: 3e527944b3dff1aa2ad8539e1bbc3c9d2828e79f77aa3348752aea5fc44b3c42
font_02_sfnt_off00015330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15330 31808 bytes
SHA-256: c89cc8a2b5bc92435d305ccbbc3abdac5e08989248eb0827be5088303ed03544
font_03_sfnt_off00019cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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