Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeadcd9508d47b19…

MALICIOUS

PDF

86.5 KB Created: 2021-09-14 13:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a7612349b33dccaf3c50889bff80032c SHA-1: bb449f51e1bcf71d6884b9984841201c9a5fc190 SHA-256: aeadcd9508d47b19fdb096d4a4fd421b13b272ece38ac30618b72267b037ce52
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users with promises of prizes or deliveries, a common tactic for advance-fee fraud. The embedded JavaScript likely serves to further the malicious intent, potentially by redirecting the user to a malicious site or downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • 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.
  • 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 http://skkouty.cz/ckfinder/userfiles/files/2315852745.pdf In PDF document text
    • http://cokhitienvuong.com/uploads/files/87694217348.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/58939140919.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/4403431436.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/67181652676.pdfIn PDF document text
    • http://evola.it/userfiles/files/12386117747.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/dewimegitot.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/74761182970.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/latofudoperaj.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/fetog.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/36205606138.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec39788d64---direxuwotajudosifodatave.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ff708af40---10107775089.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0ca48c072---museroliburuvokuvige.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210913032340.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/tadilevipefu.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/digexugom.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/vapujuga.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/pimizilu.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/pudenilozuxuxukowopesuke.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/95165761446.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/80861766473.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109030631222719.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/xiwotibiguworugizoxu.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/6bf52228d813f2368a76c5707f9b7f68/79778204303.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210907090246014.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/xizewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=android+tapping+appPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 10204 bytes
SHA-256: e452f3a1bcc39f8d7999a1a1e3c083709c7dcbbc81ce82641a799d487399ad15
font_02_sfnt_off00011d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0C 18056 bytes
SHA-256: fd7bfd26175b7e4e1077a089b5bf8e8f8b682e346611143d93d12d6e1910fac1

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