Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7eaf60fffc2d8e…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 11:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9244d19b670df36d7737f7f10897ca29 SHA-1: b176140f543b3d60eb452148d38304836d602106 SHA-256: ce7eaf60fffc2d8e0ae287b89d0cf754326c7b0e8840b6d631b47a5063098ea1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be hosted on compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to external malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://ashioke.com/images/library/File/47252422940.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/f4o2jisj4fsrkq4c4fh728f432/kilekup.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/durujuranabewesose.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b84d4efd---zexenunipasarupivedawarug.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/80445196980.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/tikopanaxisug.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/88271822411.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b697b0d8fc---92379500458.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/72542811517.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/hj8u3sg753hv69q82516do2akd/81483534420.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c50bf58d23---zigabajuvok.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16120dabd864a3---47912092824.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16073584278c2f---pititekesofi.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/jewuxurepalejova.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/13771709208.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eba0e7fb8b0b7dcc3e214d77eb36a59c/28488882051.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/9mgmuvs6c7e46j2sj8v74p1rt2/tufexobikewajapigokewevi.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/modinixukekisoforazitalof.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611263cfd17b3---xuxurepos.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/99283982771.pdfIn PDF document text
    • http://flirdining.com/uploads/files/liwimilepafodipafux.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161092b6e1cab5---6896777619.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/84745530961.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/13236417076.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=joining+words+list+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_off0000e0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 18060 bytes
SHA-256: 5b3a1c1aa042e86117939830414178a1309b19cf9b6576f22521578da72f318f
font_01_sfnt_off00010f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F85 10456 bytes
SHA-256: 1e5f02abe3f9d9888daebefb8065f8507484897574057e8403237d1c19b846a8
font_02_sfnt_off00012734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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