Malicious PDF — malware analysis report

Static analysis result for SHA-256 2882f3eaf1e2fa15…

MALICIOUS

PDF

80.1 KB Created: 2021-07-09 07:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 227e0d157a01d45283521c0fa21b13bf SHA-1: 0b58c6f59378d2dd4033d6934d0070f3a3880a4a SHA-256: 2882f3eaf1e2fa15c9521d72659763318248eeeabee3d46d9c8005b8e347b15d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Several heuristics identified the document as a link farm pointing to compromised CMS upload storage and disposable hosting. The embedded URLs, while some are marked benign, are part of a larger pattern of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/32b31ade910b13d65946b439f3a76020/42921986297.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/aa03d3d90eb5a9b59f1c09babe59a9f9/siduwezoborirowopunabevov.pdfIn PDF document text
    • https://iword.de/userfiles/file/56978783405.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/38531678185.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/49986799343.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68ab44dbe5---94609938724.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b278fde4071---rimowabigida.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/f23b28fc25c3c013798db9e29cb8186a/75193861342.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0gpqf7srvrmdet6paq3i14e1fg/88680721750.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/tovegaziwafir.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1195315c04---libapesodabu.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/fa347aae72302c232d4d44600f2f2081/paripofanikipumojuvita.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/d417spdf2ck92v4l0hd1agdmr6/zoruzozinitakar.pdfIn PDF document text
    • http://irths.com/upload_files/files/dorokabuz.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/65a6a9a09fb84d125cb035e869a348a8/wazigijupulixurobu.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/gebaxax.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/a0dn1ud0674ulr1orcvlep9c4d/7029905543.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/2424426293.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210525103144.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/gpveg21anl62p3fisiq0i182qq/wofegakegatal.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160de1393e3bd5---29973289918.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/77473534421.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa4cd2f918---fupajukebubinuwumogatalus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=hanuman+answers+your+questionsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 1780 bytes
SHA-256: ee6d8c25003eb2de61ee1fda640ec7b8e4605923364b71ee832b966c85f0f81c
font_02_sfnt_off0000eab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB1 10660 bytes
SHA-256: 3a4105af46d59a167a6b057fb97bc4789a3bf1b474ed28749fb2ccbca8d0012f
font_03_sfnt_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 18676 bytes
SHA-256: bb6467c46d87f723de00899999d7ce9c3c47c903475821c1dec1f03253cdfbfa

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