Malicious PDF — malware analysis report

Static analysis result for SHA-256 932bf966bd42e3b8…

MALICIOUS

PDF

83.7 KB Created: 2021-06-25 14:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfd07629b9141450bc55ab47558e2c7b SHA-1: 580e8bcfc55ba2efa389b2cf385791399259827a SHA-256: 932bf966bd42e3b8226571240c41bf65777132e6a5de048dda72dfb1387588ea
224 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam and a callback phishing lure. The embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggest an attempt to redirect users to malicious content or phishing pages. The document's structure and heuristics strongly indicate a social engineering attempt to defraud the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=cabins+at+grand+canyon+west
    • https://bangprice.com/bangprice.com/beta/cms_image/file/netigamotakamajanefi.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e520415017---xivuxizojuzim.pdf
    • https://alternativecarrepair.com/userfiles/file/54523249129.pdf
    • http://valeneighbors.com/userimages/nufibufetupojaremojado.pdf
    • http://mindentudor.hu/userfiles/file/guzijutezaf.pdf
    • http://bellsazshihtzu.com/clients/878694/File/22415877224.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609007d06000d---majaxoji.pdf
    • http://ahchala.com/img/file/fipusarowaruj.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d247fde7275---ganovovurotuna.pdf
    • http://www.cafeinca.com/img/public/contenido/file/pogodobaxamimerikusifetem.pdf
    • http://amandatour.ru/js/ckfinder/userfiles/files/fejixozasokavudin.pdf
    • https://bhsbeacon.com/FCKeditor/file/resoruzotabipejonimigavot.pdf
    • https://666666.vn/upload/fck/file/51210773265.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e1dd030e5---1170111919.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a1bec2c72---disirirekadariwuwalor.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4021dd4d4---18836824597.pdf
    • http://amy-tsai.com/images_express/userfiles/files/kotuzimedufeji.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/k95p3s2dq8jkhfi55rietmlcuv/xezafawefe.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_off0000e3b9.bin
f270467701e6a170a9c9ed2902eaaa40399621dafd9cbe86a84493dfe5eb4460
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 10868 bytes
font_01_sfnt_off0000fce6.bin
e1bf37e63671d3099a1f2f60ee8bce08df7734d725a11a4a7aaaf7a475e8d995
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 17328 bytes
font_02_sfnt_off00012a13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A13 16792 bytes