Malicious PDF — malware analysis report

Static analysis result for SHA-256 6944ea3e093b8ee3…

MALICIOUS

PDF

85.6 KB Created: 2021-09-04 14:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6f94ad550954d034326f2b93b6a63d8d SHA-1: df4136f4bd7b63e1fd47ece89e34159c1355bcce SHA-256: 6944ea3e093b8ee3e274696071be6884bc403d1a072a39c8e6053e36c8fc0302
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://emtracing.net/userfiles/file/lulataranuvawamixo.pdf In PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3746ce6744---89595854606.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609315ad12162---92219075822.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/xuvoperitegipupivipam.pdfIn PDF document text
    • http://beadsandsupplies.com/images/file/59129296362.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/57655165803.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2783205541---5669177697.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/kejibajapigeniditufejelo.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/wivodig.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gemenu.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/fokum.pdfIn PDF document text
    • http://recviem.ru/img/upload/witagiviwidemisubasutuw.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/rulegogoku.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/vixigawikizenejuroz.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3bfe27d17ed72c12db016631bf16d687/14121317019.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bee4c52c4---rukolikovizedam.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/82032764787.pdfIn PDF document text
    • https://datawire.gr/files/files/10712132126.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112e675b795c---zufewumedid.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/59829666860.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5eb4e0e36ad4339be7c2711eb2ec7e06/tajanugegobozopokamesiwu.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/kusizapunabudelerateki.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748ce143edb---tixeratimu.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/21227976525.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/fogigujogukeref.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/83084462487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=jorge+luis+borges+biography+pdfPDF 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_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 18524 bytes
SHA-256: 3c1d4e6ed84a9eb948ef6983196a6549bed7feb7235ebb30dd2c561e4d33b335
font_01_sfnt_off00011774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 10920 bytes
SHA-256: ae558f1cbf889770d5311527dc04c5a26db9d9fd4493460a22d05644f31a41e0
font_02_sfnt_off00013078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13078 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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