Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf892cd30fc7d8c7…

MALICIOUS

PDF

86.8 KB Created: 2021-06-13 10:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7020587b66517a20ecd014188968e43c SHA-1: 148fe2454d1b3660333769bbaa7bc16e89e92f81 SHA-256: cf892cd30fc7d8c7bceaac053b3c33e2e1d02d203ae12eeb4519946b422dd3c0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://philabc.ru/uplcv?utm_term=currency+of+asian+countries+pdf PDF link annotation
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/19758e1e98c0a97b08f9b313875b184a/74309058380.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/73627058521.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/buecassnfs35s3i5nclrufdjs2/27693562820.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/74682965284.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608df0713d783---78031267264.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ab02d0f42d0ae9b79277b1bb4fcc1fec/96320600485.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/nuxup.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3b67lptanhjoe7h1dc2selaer1/jegezoxojopufutixodune.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/fbe5e881fb2089ae5d9eba22de09089d/zoniminizojojig.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/a0329be625bf117e730aace892bee86c/derapagixe.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/gmteaadteg4jvustv2b32sd0a5/duvoxaruruxatozot.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/sabudaju.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/kkj9quj9c8dblk17s25oau3185/wezisepo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080cac596dc2---32459697293.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e56a57d1ffea94fe825db639eba9f199/20349306281.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f62a371069---38708219351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn 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
font_00_sfnt_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 5124 bytes
SHA-256: c1f043d1f357893f00e68630a6a98a6c6001b47823074465a614b61591b1055f
font_01_sfnt_off0000eed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 3852 bytes
SHA-256: 71c98f1f0ae2ef9333828ee85ea83c9551a83b06002846ea3a22cec639e85686
font_02_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 3980 bytes
SHA-256: bea65ff9b5279615aa88d70352ff6ba3b3dd8401a8e626866b84c06df41393a3
font_03_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 13196 bytes
SHA-256: 6ee9a8aa60dd9a1687c769ce1fd065da0521b57ef67b7a8bfff5ff2da18d091c
font_04_sfnt_off0001312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312B 17876 bytes
SHA-256: 74f90a1025f1bf2449602be061bf2494ba710b6a4cec0916f48affe3461c1f96

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