Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19d8b16f203352b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 02:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f200d26b5ea9798a1de7c0fc4ac6ea2e SHA-1: 5a57d6713a4d0a0b9357b5d09d3502c0c649f322 SHA-256: a19d8b16f203352b817a79e4c40c72e75eb077b268e368d957d3e3c5151cfa93
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://usdcp.jp/user_data/userfiles/files/40626725342.pdf In PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/65307348660.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/jujagegev.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/sulajamimuxuvoripubazo.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/jikisepigoseze.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/72389437524.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/xalel.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/iuojfds63d29acaob4685m7fs4/35554528154.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c592929efeb---lazagurefudup.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/nosotozijipazotuzoriku.pdfIn PDF document text
    • https://aksusu.com/upload/files/begimojefibamipezizeva.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/fc0q9mmtlusnrih4smjje1s009/xalexabolavagig.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/tbb1sjlq428km3vv7852ksp95l/85903402567.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/vorif.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210709143620.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/66394724834.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/9309126071.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f298f6e7f2---pafame.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-25/20210625064351449630.pdfIn PDF document text
    • http://spharma.ua/files/file/49273801102.pdfIn PDF document text
    • http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/rakerakelawixu.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/zopajositigigedefutej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=fracture+mechanics+fundamentals+and+applications+third+edition+solutions+manualPDF 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_off0000d84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84D 10960 bytes
SHA-256: 8806f43f19b1099d144c55a21f1ed93222ef23ec6187a962d1fde3c8b26eb89d
font_01_sfnt_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 18580 bytes
SHA-256: 7b7f8190d4b25cb544f61861a1ef1a91e504137ab2a6ea53522120368e9947bd
font_02_sfnt_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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