Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dd69ac1499e2b3…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 23:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a29a1f674523b338996649b7128fbaa3 SHA-1: 8a326e25914d4a10d0eb3e4553d6b79b2541a9f4 SHA-256: f0dd69ac1499e2b38ac8fec5d6b89da89886128d5c429d651051bc2830164da2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted, but the structure and URL distribution strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0137f54d67b9d1c08917ab0f985f4280/81612318840.pdf In PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a09481697b5---davolatavibavamo.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/14327707994.pdfIn PDF document text
    • https://naves.cz/res/file/67206254515.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/liropodawupukalivowutos.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/47005431852.pdfIn PDF document text
    • http://crm333.com/documentos/file/7900224425.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/lenir.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/74196356474.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/79862284795.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/pekepirefulinifese.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/kinafevok.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/041208568047.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/japuselikaletoj.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/zasofokez.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d323c3eb33---rijodizikejadejelovoxo.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/xegan.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/b979bcca326eb0b1b894727be55c719b/wixiruwakejajatikig.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090e1e843744---tugomamazotoxa.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bb114087c---46412325904.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/60483745872.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/minufo.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a649faacc78---jajuzinizivokitefarakewux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=kalender+hijriah+dan+masehi+2018+pdfPDF 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_off0000da2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2D 18652 bytes
SHA-256: 881c549c79dfb9203c5fb368366b7fe2f019e0b538036fdab6edd1365029e03c
font_01_sfnt_off00010ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC9 11168 bytes
SHA-256: a8c3cb9216ecb49b165b6cdc494e455dae6156bedb8f7931acd8ebb7406687a1
font_02_sfnt_off000124ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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