Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeaa69cbeaeb9079…

MALICIOUS

PDF

75.3 KB Created: 2021-09-29 12:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dfed5f0e3d0cb0e40a89c603589d9a16 SHA-1: d68dda23b212dce44e73e9093bf97749f603e293 SHA-256: aeaa69cbeaeb90798069fa3828cfcc5010a23b0612f0ca3dddf7b6c266d58b26
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to phishing or malware sites. The presence of external URI heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=how+to+enable+otg+support+for+android+mobiles PDF link annotation
    • https://brawlcall.com/ckfinder/userfiles/files/88914327109.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4a105d1f79524a22c3cceaa321cdb280/85995567111.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/10894298490.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/32471699666.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/30391849380.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/38407640733.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/17824325435.pdfIn PDF document text
    • http://tcihk.com/userfiles/jelavomeg.pdfIn PDF document text
    • https://perbloland.com/userfiles/file/86265491549.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/62039863239.pdfIn PDF document text
    • http://www.amanuttarakhand.org/ckfinder/userfiles/files/33888426429.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/37811928833.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16151ac373467e---tivuvexagonibixibago.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/91843776414.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fa8f80af3---68746555920.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422f4eb88f2---86471269028.pdfIn PDF document text
    • http://carszana.com/image/upload/File/63436575564.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/kebuf.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/kozugerugategenifima.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/logezazeril.pdfIn PDF document text
    • http://home-plast.ru/foto/files/gagimokukaxafefadora.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613569ff7743d---xaleworozaruzajije.pdfIn PDF document text
    • http://rotang.net/userfiles/file/61641329955.pdfIn PDF document text
    • 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_off0000ba80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA80 11160 bytes
SHA-256: c3b2a7d74b17e11986ca2d7dca83473c54c32321fa2d7f673b616d53cfeb3e66
font_01_sfnt_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 19736 bytes
SHA-256: 23f1c17c6889bda41306054aa1b639ac066226fce48fd1edd3307e4164fa2ebd