Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb2fe30c0e0d38b…

MALICIOUS

PDF

101.2 KB Created: 2021-08-12 03:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8f318a03937f168ea0a1924e3d581ef7 SHA-1: 4bf7ce0a42aa1645e6e48f88277a8868e74131c2 SHA-256: 1eb2fe30c0e0d38b2d67fb039a454c026cadf6b43c807b6a239148ca441d49fe
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to potentially compromised WordPress upload storage and other disposable hosting sites, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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 http://rakkhunnursinghome.com/user_img/files/rurujolafosamedowafimat.pdf In PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/69001592916.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/73691888675.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/lenutowoxebotemuxuzojiled.pdfIn PDF document text
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/99172111791.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f491aea2fd---bixagibavokumuzodozubowim.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/95072602227.pdfIn PDF document text
    • http://kclandscapes.com/ckfinder/triplebuserfiles/file/fijidawifolawipeloxobewik.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/618937595.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/9bece3df66e0c386f3a23efd0493df93/rewaxumanovaji.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d62560bc59---26159780133.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b5d1474d---24400244735.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/63540428052.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9f1af2616---31976830150.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/gurumizudetivogamiger.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607a199764835---55083974702.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/tetukusesonekizu.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee97be86178---37966132781.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/84744478046.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/voxivodamevo.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210725103359.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6a26f278---97195768345.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/2e9eck73jhe340is07fqb87lib/jakadanajunumifosawamiv.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a51e40c412a---doxasepewaninujosu.pdfIn PDF document text
    • https://12tiga.com/contents//files/vijamekusexaletuvudevo.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/64573126254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=os+dez+mandamentos+novela+record+capitulo+52PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBA 2112 bytes
SHA-256: de97491fc977eba177f03e9af2df956f2eb9c2e3958d9c8310795e6d7b6cc54e
font_02_sfnt_off0001375d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375D 19956 bytes
SHA-256: 2a13d397ec51d0b94be955b118724d5ecd431c0909ebd0f5aa291e4652412c4f
font_03_sfnt_off000168bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168BD 11180 bytes
SHA-256: 038699540d34b089c88f1f5e2c51f6ffb49ce79fedd336e4a73f0e9754af7d27