Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f0d70ce20cacab…

MALICIOUS

PDF

154.2 KB Created: 2021-08-06 00:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8907b5f64d8912a7c40ad76375df2b0a SHA-1: f8f2a4d6343495ab6c99f38c76cab6c77a2800fd SHA-256: 38f0d70ce20cacab4ab94edd6e8faf3272e59ba7c63724ec9136cc510bd32856
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and link farms, indicating an attempt to redirect users to malicious content. The PDF structure and link farm heuristics suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://panziofabian.hu/fck_kepek/14445896289.pdf In PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070be144cca0---97523946202.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c655895a80---jebibagobuzozotowilukab.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/tosonizizijuzozeramapu.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe4b82292e---nebajotixiw.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/worepomen.pdfIn PDF document text
    • http://kurdumovldpr.ru/uploads/files/63890912645.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/49622801336.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f7a962508---bugilesodabajupefubuvarej.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/tubov.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b6411e6e5---97849257430.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608d8d788bfdb---50917703633.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/48358556695.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/46025404235.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076748c98c83---nudejixuloj.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079885573026---fijijaxadofagetokijodivow.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/011de3a71b8515036602e39175aed3a7/63045620018.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/99935387751.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/63086667585.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=human+development+a+cultural+approach+1st+edition+pdfPDF 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_off0001f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F63C 11092 bytes
SHA-256: 464cd922703b5ca6c44919ac9904b514c99f397d6ea224d440bf39fa9409b5c2
font_01_sfnt_off00020fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000227f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x227F0 19204 bytes
SHA-256: d383b74622542ff33ec49c887ec21ec0ac3e227594dbccf66bb45580705d52c2