Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b332224f4bf5b30…

MALICIOUS

PDF

94.0 KB Created: 2021-07-02 12:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f89fd6d8114f7a8facd647752de9960d SHA-1: b3382a9e7fbe06d4b80c44495f1e4fb82eab092f SHA-256: 7b332224f4bf5b3095c44c1dbce09fa4ef554310b5446984d4adc5e7864bd66f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating it is part of an advance-fee scam, specifically a lottery or parcel delivery lure. It also includes numerous links to external sites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to distribute malicious content. The presence of a 'password-protected archive handoff' heuristic further indicates that the document is intended to trick the user into downloading and decrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 9

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=pubg+highly+compressed+for+android
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/alrsks4cktait4pkoupj5lrs11/xapizazesuta.pdf
    • https://geneticapanama.com/userfiles/file/nuseruvetaguramariwivur.pdf
    • http://amandamaitland.com/images/file/kepul.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210602191552.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/a7ec3df31c228db3d6402a7a38607dca/sutilagoliwuwoluzovenam.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b50eb3c4688---94028633693.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086505a60aef---refetazonexisalepoxonoxo.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb0818312---bopenofujoxonije.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c06dc38c91d---vonatupusoviredebo.pdf
    • http://patroha.hu/file/47054182001.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e95d9771e93cc897ce03cbc6d0036a4f/84209174036.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607370a7406f1---wekawufukesebazobowaja.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160774a50b6f5c---rogizupuse.pdf
    • http://ubest.ru/images/file/99577295236.pdf
    • http://ristoranteibucanieri.it/userfiles/files/nonomamaje.pdf
    • https://dodatkireklamowe.pl/web/uploads/files/tazifatepuzirisapekuw.pdf
    • https://aimhc.com/userfiles/file/fusonum.pdf
    • http://applexin.com/ttpsea/files/file/64190056395.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc18d2d20e---vilukalekoxiwomanetozubis.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/394368e72391ad24ab1aa1d395e7aa8b/23746650525.pdf
    • https://skatrip.com/basefile/skatripcom/files/14495424857.pdf
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/91011488098.pdf
    • 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_off00010709.bin
36c261cc7e7a0f2122f34fda2966e0604ec432fa6969b1d68793829f81f1b355
pdf-font-stream PDF embedded font (sfnt) at offset 0x10709 18772 bytes
font_01_sfnt_off000138a1.bin
059d10c8bc61d45c12782a09c0ceef0922276b24c7d3cad7116e1f0bcc39f685
pdf-font-stream PDF embedded font (sfnt) at offset 0x138A1 11324 bytes
font_02_sfnt_off000152a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x152A3 16792 bytes