Malicious PDF — malware analysis report

Static analysis result for SHA-256 b766003a301484ca…

MALICIOUS

PDF

95.5 KB Created: 2021-08-01 13:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8ec63027963d53c2e059739487d0d89 SHA-1: 8ca65ec3d594f8807836cccf7e56fab694781679 SHA-256: b766003a301484ca16ce4be090d61a93bff83cc8e6078891f1ea9f444eba4c87
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous links to external PDFs hosted on various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest it is designed to lead the user to download further malicious content, likely via a PDF-based exploit or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/e643ba431af50d658165f380876605a2/mogawelil.pdf
    • http://vidol.nl/userfiles/file/babalepegoxiwuratawaveg.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/tiginoxujunutadotipeg.pdf
    • https://rosenstein.lu/userfiles/files/loboguxojoxenesavuta.pdf
    • https://pasarant0g3l-turbo-h1t.com/contents//files/35524662384.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3040008cb---67955100831.pdf
    • http://canxetaidientu.com/images/file/pidubolekorefibebej.pdf
    • http://newmob.it/userfiles/files/99976326904.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/deredipezuzefex.pdf
    • http://kiiga.ru/userfiles/file/tagitomupur.pdf
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/65521995103.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b46c4339a21---60775410129.pdf
    • https://webmenuplus.com/images/file/nowumogafosokowegibin.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6087a76c78c206cc88cc7b61161a7f93/puvama.pdf
    • http://www.klimavill.com//data/editorfile/mezebinovawalanuti.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/80kqr0l7dkmttdvl5aba2psmdg/nidogudaresaxotu.pdf
    • https://kingdomofgodmn.org/userfiles/files/minoxegedenikabetixomikoz.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d96496ed72758fba0c687d378ad01ba6/favozuvuxametegod.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-13/20210513154855808174.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2438b7f5f4---89573057485.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/36fd0ae8700c49044b2508b3aad2d4d1/7048790297.pdf
    • http://tuzvedo.hu/elemek/file/wivivazamenotaso.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8155ab1cf---dotujuzegifa.pdf
    • http://axwelindia.com/uploads/60433256115.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=martin+luther+king+jr+worksheets+high+school
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001117f.bin
521059694d8a4c72dfd9425acbed428ced9c81281d780a69f2001feefb02e7fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1117F 17368 bytes
font_01_sfnt_off00013e57.bin
81ce774b27c01358ef00c68fc97638bf60e52fea44457df69a93955412cf20b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E57 10908 bytes
font_02_sfnt_off0001579c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1579C 16792 bytes