Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a93707004f516f0…

MALICIOUS

PDF

98.9 KB Created: 2021-09-06 05:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fadd2a807e7e1ec3e6d43f6a8608cd51 SHA-1: c126ae7e1a768e574fecdb75aff52289ed6c8cc4 SHA-256: 2a93707004f516f0ffe19094d57fff49750e5440b7186fb889b50f1cd9b1007c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs and links to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of multiple links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://archism.ru/uplcv?utm_term=lavazza+blue+classy+mini+manual PDF link annotation
    • http://younewstoday.com/task/userimages/file/68702879304.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba695c0648---xosaditewinifuz.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb5c6d386e---ruxenunudivokax.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/343266f3867f998a7984415dd6d86092/mugarosalivibomorer.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/1cc8e595506f7463c513238a3bf3f9e8.pdfIn PDF document text
    • https://facades-metal.ch/ckfinder/userfiles/files/70498017335.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacc6b9466c---11756477114.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/pazatavu.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161005db9edf0d---34066931489.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/tekokaxu.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081109d49653---87194164552.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/irlnprrdf5va8c0kar8ot6d676/nadeweruvawagumowetaz.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942d7f082a4---zejofemaguvamaganim.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/panorabade.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/20643b84a06b11e7fdfaae26bbcefb07/wuwodipuwevizevasazodoso.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb552958ed---zeminasixinibijagusuwafo.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c739de612---69386865523.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/67484024176.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c476e78a2f6---kesobopuxizadomowekadi.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/69999179528.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/ea9l27u09bt8dn3hu0nk6o26k0/xilal.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123738e6d893---80813513797.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/sikafe.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134171ec281f---7366710202.pdfIn PDF document text
    • http://co-mit.com/uploads/files/verarorozilotat.pdfIn PDF document text
    • 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_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 23976 bytes
SHA-256: 7d6b3ecbf44af11f9df3bc1b455a2b7164310372105c83a597d8512dc9151614
font_01_sfnt_off00013830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13830 10512 bytes
SHA-256: 6af704fe3fcef7def95d63fed058bb04781d895397db90613db14c931f547893
font_02_sfnt_off00015019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15019 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_03_sfnt_off0001652e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1652E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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