Malicious PDF — malware analysis report

Static analysis result for SHA-256 0752ab372b811f52…

MALICIOUS

PDF

88.7 KB Created: 2021-06-30 01:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c0943f0e9faad63eb334cc19410dd306 SHA-1: 6730ae4871f4f1e060514048c956d2fe0fee6e3c SHA-256: 0752ab372b811f524debc87afce454fb833985d663c3a06199a7f0b0c8fe1eb5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e70a52d40---takor.pdf In PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3c4789a9b58d1f66acc580583fb0f5a7/78967113613.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/wiwamukepoxezidopolebal.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/15543609227.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8f877dadb4126e4fd4b35ef27d7a761c/87029734608.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7557f503fb---dalirufinebunaxujariwuvan.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/87432415924.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/m6c87d4httce7doj5varl5jds4/11956082678.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/25360416610.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/nixenexokekaxumetigabu.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/63764880617.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086003e27f3f---17734288595.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/30422661738.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/a74e74d7f8278d8bc4e4f6ad817a4c46/tajofinajiposalux.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/kccsg4gchj2v830udj1208d986/roleratijatibuwefop.pdfIn PDF document text
    • http://jarosi.hu/files/file/99142808986.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb4e5a0423---kodofamopolegosaziwar.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/wururigejoseluj.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/25907286662.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/wulumoxasusimavuverulub.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/dixenoso.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/42668908870.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/71eb739fc7672628ea34471176acdc46/pirejexumode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pi+over+4+in+degreesPDF 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_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 16624 bytes
SHA-256: 9fba593e7527deae090c71252fa894892029787b9df978572174bcfdbab3b944
font_01_sfnt_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 10260 bytes
SHA-256: 8a13d8c0d08b0c021fc5fd180f2a656c805b1549501c2a6a253b62f9c5d5d02a
font_02_sfnt_off00013d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1