Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55d4c4fe4365bf7…

MALICIOUS

PDF

86.1 KB Created: 2021-09-18 16:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e021128e63137bdcb7cf43ad89b78a9 SHA-1: e44a9ffd8befbf81450e5c3eee7933e96a6ca41f SHA-256: d55d4c4fe4365bf79e8415fff3a6fb8b0cc32d5c79bcb68899ff1e4b761535c6
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into fraudulent transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=how+to+clear+space+on+my+android+phone
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614071bb79c04---57880661171.pdf
    • https://daqing-jewelry.com/uploads/files/202109111145351151.pdf
    • http://dotykbylinky.sk/_subory/subory/botabonutivulot.pdf
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/8153985910.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0a09a9c46---xalevaluwolina.pdf
    • http://shinies.ru/img/lib/file/merifisebo.pdf
    • http://ladyqueen.it/userfiles/files/70739134510.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/fodiruxufoda.pdf
    • https://cupanghitam.com/contents/files/rexobuvetovokorepi.pdf
    • http://all-premium.com/user_file/files/nugatikegobowemiselikaxok.pdf
    • https://magicdiscoradio.hu/userfiles/file/27146355791.pdf
    • https://maribon.net/app/webroot/files/userfiles/files/tutig.pdf
    • https://kluchar.net/klucharnet/images/file/mudetelum.pdf
    • https://darshanam.com/ckfinder/userfiles/files/26045450438.pdf
    • http://medtravel.lv/images/hand_uploaded/files/40559758489.pdf
    • https://transmar.biz/ckfinder/userfiles/files/dimuvazu.pdf
    • https://ambient-interier.cz/files/files/jejipibirasoru.pdf
    • https://limadelimon.com/images/file/jesubiwivajuledi.pdf
    • https://pyccenter.com/images/Upload/file/lofol.pdf
    • http://dharkaninternational.com/survey/userfiles/files/xonuzigikevu.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144fbd8c9e84---95830241226.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161405b295dae4---wijakukube.pdf
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/16473467082.pdf
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/43418119042.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_off0000ead0.bin
1835e65d28c0ebc6cb17a7b83f1ddfa969f8fc41a76323bd539191f34b7d5a36
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 17620 bytes
font_01_sfnt_off000118e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 16792 bytes
font_02_sfnt_off000130fd.bin
218eecd3e2c3afa8bce16bf12127a7bc5b2e6528ad0bfa912d71baacb744e0d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x130FD 10968 bytes