Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a11ccc7cf9696a…

MALICIOUS

PDF

192.3 KB Created: 2021-07-22 21:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f82f348290b375ffafde30e8e367eaf2 SHA-1: ae0edde5603a9137a40eb4aeab90505513f8984f SHA-256: c3a11ccc7cf9696a98e8a429436d5b60de361168ca69195da345635df9f47e16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9520

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://xn--faade-mtal-p6a3a.ch/ckfinder/userfiles/files/46736202800.pdf In PDF document text
    • http://soflocops.com/clients/67403/File/juzeraw.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608786b110a78---23880044165.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/dajimifodenezanutexinowuj.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160851acd31b38---rejodo.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b616010a3---fugeramuxemavajazusunuvin.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/cc1bd372256e91f702fa50994b01ab8f/11827419726.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/6719588c2cd40cec837469d7927331ba/kelekidezub.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c77cec9e---48944066271.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/15211153793.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/rivisupoloba.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/12628516095.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1c553259---57538736354.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/gawufejepilob.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/64519525432.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/12081890903.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n5e42kpegsv629r8g89igfrjj5/9695422653.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/dimanejebebemafuvu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/18faf9e7877ca79c39bd9a5ce51f9918/19189131322.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/93109721992.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e4ec95cff---lexudugaxogejawutofibogup.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/34cc507cc8a1a18cc8711422ef77dcce/difewe.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9ac7b96d0612fc01f53f8e6a0cbb6522/920452686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=guardians+of+the+galaxy+vol+1PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0002a2bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A2BF 18488 bytes
SHA-256: a7b3c0f3f19dee9bfe523e9c516a280bab09129e8146168bb74f92b82fed565f
font_00_sfnt_off00027188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27188 18532 bytes
SHA-256: 39765fe692eeaf1e8df63c19caf8fcf4546f986c79ea1a90fcda6c20f60f4b01
font_02_sfnt_off0002c030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002d847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D847 11104 bytes
SHA-256: 26364aed433c1e900233c8778f7a910d5adc7006e866ba8d40669021c1bd58a7

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