Malicious PDF — malware analysis report

Static analysis result for SHA-256 d054a165b149199d…

MALICIOUS

PDF

107.8 KB Created: 2021-07-02 18:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 34f123e52a59f8a4743b71804ebc215c SHA-1: 074b7cbb4b428d987027bd9426582cc0ec4f1481 SHA-256: d054a165b149199d071861cde2b9c27926e88be9042f75e34aa2ba3f1b615902
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded links are consistent with attempts to redirect users to malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://huntic.ru/uplcv?utm_term=studying+public+policy+howlett+and+ramesh+pdf PDF link annotation
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6ceda2af---bulizopiwegisevitareke.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05da40ff9---42032046710.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21ee27ee7---56820118541.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c5eb11d52---86186581535.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/25060261710.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/re2i7cvg2k4gtt5g2cqe85fvcm/42301549744.pdfIn PDF document text
    • https://codecs.roimages/file/muvowojerorir.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b341fac8c0c---14127231889.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/jogifen.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/54447068591.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/nelemipuvepijomemolofiduz.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad49ef02b8---35053873457.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/312aa3e6a233a8e5edd6b9a6f8854454/burewoto.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/71477049451.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/38345890597.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b548e3c32c6---40244310526.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/45034b6f90c74686e044b879cc31c379/rebikatarewu.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/65e652ab498d49c8d015e82b05a37e43/76898625645.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a38303e342f---19524330210.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade13d1f587---32267777856.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fe07b24ce---25388998714.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/35856980042.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/44057470158.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/fewabulimejafet.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/e2e64e92451c723d2b01136a81489d6e/venemele.pdfIn PDF document text
    • https://bfull.ru/uploads/files/zelulime.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16088b7ec0be5e---dexulasetesa.pdfIn 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://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_off00014285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14285 16880 bytes
SHA-256: 19b87c494dc846728c2a23c1d8450c69c43e88f83f8580a82bf89e507a1d5745
font_01_sfnt_off00016e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E42 11580 bytes
SHA-256: e31ea5bff1b5eb84dacced28a9f317767a3674801b06c26dfbaca124debdb8f4
font_02_sfnt_off00018932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1