Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c594c5c367fc4ef…

MALICIOUS

PDF

86.3 KB Created: 2021-08-16 19:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 297b43e92b5ffdf5aa855c1434721e83 SHA-1: a243c06a93df2621bdd55b9f66fa28f3d3a99844 SHA-256: 1c594c5c367fc4efdd47bdad9daa60adb8cebd2c852b555f4d217f2ab607c7ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The embedded URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0a41a164afe4b6ccbffc7ebebeb6dba2/xuwedubetaba.pdf In PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/nlrfamlkfa282m6hesf4j9gjpd/webogeropavidunij.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/3b2a0d7166cda6239ce55e076bce9d1b/56393649224.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d33df9301a107993fe1b378281055e69/milowuxixunexu.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/7u9n3u12mh0vcrg3hfgubv0022/32416303618.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0dbc7beb5061c4f1799da8c8ce91434a/bikorix.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/l1g8ud2b3q8b3650clpmivrqde/6094112091.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/2792086470.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/446e3c13a236656ad7856d1e7665eac3/vomidimuzomomunerilivetek.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/tizeboribakozumufugap.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d5cea5c2---29812729719.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/dijejapinimoxukevevobek.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/29598127114.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/17885586448.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/jemunoviwatabutunata.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/07351a64e73e9b8d6fe457ef80aed6b2/47591588930.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/45223591472.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab64b04dd---rogelax.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/vavegegusosuvugakulipivi.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/bubijasupunajoli.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f274423ee19aadac1a8c93ac111ee826/berapor.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/kabezop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=10+ejemplos+ejercicios+de+minimo+comun+multiplo+resueltos+para+primariaPDF 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
font_00_sfnt_off0000d34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34B 18480 bytes
SHA-256: 566f1160ef41866a0699b2f208d1be13305f2c423eca1223dec3ce6cea7ccde5
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 16160 bytes
SHA-256: 5c13cceb9d36bbc2bc20aea0fe1d16ac5c722eae827defaa6d249ccd2c25c082
font_02_sfnt_off0001170d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F24 10980 bytes
SHA-256: c7a504e263a228021b979b3db5c898dae6c5cad2223bb6a8b42022e0fc5a9419

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