Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c982f9d0bc2729d…

MALICIOUS

PDF

86.7 KB Created: 2021-07-08 12:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 461a24ff81a07ead7ecf081f469e56d6 SHA-1: a05a787aaf63a76cdcf36e83c6d4a47a9ea0e315 SHA-256: 6c982f9d0bc2729d13c865426104ab61c8aa41c2bdcaca1d40fd380e07043c34
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites hosting PDF files. This suggests a phishing or redirection scheme designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0d312f8e4---bovexajoletunowokezamiro.pdf In PDF document text
    • https://hzautomatisering.nl/userfiles/file/kufimamopunaralamuzot.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/kukudubaropizelok.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/98595642657.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/41f3b58eaaa3d3762986519eca48c6c5/bikomefajijamotepokodo.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/gadawufokimewoz.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/lubig.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/3316039851.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/o4f2atqmgronmam52iak9p6efv/36430401031.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/luruxubogidelulelu.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/133ae81156f8fdd930b11dd38445d3b6/14959511457.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/sijogamesobiwimofibija.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/cbd402e03a652eac0c02f14c2781b1fe/24408296283.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/881562ce383f0748f61c9c317d044f2d/futawamarunitajub.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/12662583454.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7fc64c938---jumizipugaxafosetezar.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/bd124a10d7f46d798f32f6bcbd03a8de/wumixewuvoxuno.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8da035d53b470db809163b1a9bc6bfa8/75781566791.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/533c827b99d7323ea036a4d78683751e/nebadudaxunuwopelalej.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/979ea5385aee3a6d36b8a7e5333c26dd/tobakaw.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d25231ed853---kodepe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=god+has+done+itPDF 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_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 18280 bytes
SHA-256: f63dab10527d304cccfda8bda31106536e03be8d2a8f240ac9034691ad683038
font_01_sfnt_off00011db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C7 10240 bytes
SHA-256: 2ba27dba275b7c71d0c0ae5d1b8800f6b5b3e993a1e1ef552504e1ac499d1534

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