Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4d64282915d8a6…

MALICIOUS

PDF

85.2 KB Created: 2021-07-30 12:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 92022e852a2a0bf80a7b252182859459 SHA-1: 305c2439ca68c86820a43396908376ef6f816f35 SHA-256: 2e4d64282915d8a6321c32e54b8f17ef4e7bc227068ebc6bfbb7b485982443e5
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bangprice.com/bangprice.com/beta/cms_image/file/sotaxutegefenevosuku.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd5b486b12---vepiwibap.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f4603aea7df963220ad11690885998ed/19685097595.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/t5pp7cop5b8c7c81g4830e2np3/70983121245.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/35322696229.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/36338719548.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a14578b27d6---gurijepamovijida.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/jafunenuza.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/92083c7ff48985c3175cf6007b312e7d/zadusakofedidixatotabo.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/31790719366.pdfIn PDF document text
    • https://anfauglir.com/images/file/nekajadetexitefekotep.pdfIn PDF document text
    • https://topupdana.com/contents//files/31942106827.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/nitavoganibep.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/raduferoro.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/nguta1tq6ieqbmlvduatb9rfh9/dulubuxuxinivefavo.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62cae9d745---kazeletojiji.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e13cd17dd---pufav.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19db736a7b---fisugebojanixujosewejate.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/97541289439.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/1611953079.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/46979155201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cluedo+the+classic+mystery+game+how+to+playPDF 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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 17308 bytes
SHA-256: 4ada1cc540e8541c695c88c90f7cabc20e7cab1a6cb8837b95e77bd7834b7f02
font_01_sfnt_off000114c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 11188 bytes
SHA-256: 3832d80f4794cf15c7fa32e9813449d8e61fc3e5312e6768218da570f2c73dd1
font_02_sfnt_off00012ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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