Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d673184c2a76ba4…

MALICIOUS

PDF

83.8 KB Created: 2021-09-09 11:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8b7c0ab058d5fb22c03b5000611aa9b7 SHA-1: f8eaff99cea410700a72d89187fd35c1c2e748e8 SHA-256: 1d673184c2a76ba4f650149856c997df3f192db854ede85c2a0534705981cbe1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to potentially compromised or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://industrialsupplies.pk/userfiles/files/luwubujaw.pdf In PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/53107500721.pdfIn PDF document text
    • https://ekransamara.ru/files/kopak.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/10899247635.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/lafixaguxagojitos.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/20113255696.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613877fbabf26---49689487954.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/73190869082.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/gutemaxiseradavifofuwag.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/roxixugowemibolevife.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131282604daa---monaragefukaxil.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff940507db---gamivurudeju.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/bijenodewirutuxirusumu.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/gukemogid.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///20507739554.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/41993848611.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/18840539271.pdfIn PDF document text
    • http://webursitet.org/Files/file/73464901945.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/wududebawarisaratov.pdfIn PDF document text
    • http://feg.vn/uploads/files/38847103525.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/50461963516.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/leporulo.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/suvezodezugedol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=photo+editing+tutorial+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/jojulexime.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_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 17596 bytes
SHA-256: 4757caf5104d943f215b9dd54badbb5ca68b66fe1c876e092894b9da0500cbc9
font_01_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FE 10708 bytes
SHA-256: 6231ac27a547a6b8462c967714e542475e1d04bf326ed243906e92955be59afa

Open this report in the interactive analyzer, or submit your own file for analysis.