Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c29fef90f63615…

MALICIOUS

PDF

83.9 KB Created: 2021-07-12 17:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d2bad7542c93de7818ec51f52d8dab14 SHA-1: c934afc424b7236978be7de8a4b1ebb188e4dd5d SHA-256: 09c29fef90f63615d0e5a2d5eaf36b2accbd4b2b9ed0b1faa456af93f5e18c9f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm hosted on compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious. The embedded URLs point to PDFs hosted on these compromised sites, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/4d55dd544b987af88f5e14b5714512a7/xapopolud.pdf In PDF document text
    • http://pspectr.ru/userfiles/file/48797035471.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bce543f9b3406fd4e7cff699bfcff563/vosupojifodazomepitunepo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/cb15b78f9e5285b402574167315223ca/siduvofodaxutawoni.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/93nq3i1e0d0pmhlc8gbg1cgp4o/nogedulabebijofelalituli.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/16475168901.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/14abe8dbb0e78b7bf693b93c3de412ba/31476358230.pdfIn PDF document text
    • http://armanetti.com/images/72088101559.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/xewem.pdfIn PDF document text
    • https://polandpools.com/contents//files/kedipew.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/p3vvui6gilbh6ija32rvs0q0vf/92707964082.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/48a31d6675aeb5ffbeffe963b4a2ee2f/zopotuxesosinojefupiteker.pdfIn PDF document text
    • https://isleo.com/i_photos/file/93702228983.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/zonasorezemobibawefago.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4ce7bb37d---lufofewonutafadazub.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/wufekixunar.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/noputuzesofopibekeze.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073b96102ee2---xizename.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/16681945681.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/5242b5a586ab5754ce45a44900c0b05a/zakeno.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/244fe850f94ef89ebe18c135f38a9d8c/xikuloroguxijevo.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/4c804bebbfa55eb01bf9395beb4b6110/bosoferamesopokolobipi.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/dd407ef7b90f9b602ef5bf4508f2da48/55614881182.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/51962498932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=1+pm+cet+to+istPDF 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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 19768 bytes
SHA-256: 74826c0f60b2999d0fa2cb8ccfe962b1f769df38c5be88a34acdefbaf81af1f4
font_01_sfnt_off000113bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD4 10076 bytes
SHA-256: c8d3e22d0cdf500a9895043dc89755c010cdc99492c2c2fa4dcb78bb8512ae7a