Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3842f769d3a5e6…

MALICIOUS

PDF

93.8 KB Created: 2021-08-15 17:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d2a25a40c6190880db2b8e8831e357d SHA-1: d3417ddd9aab3d8c5ae86f24186389271091dca3 SHA-256: 1a3842f769d3a5e64619d309088a7756cfb37b682856e6923afeee0b754a1bc7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. It also contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072c2d0040ea---pebopujasepodo.pdf In PDF document text
    • https://coatielectronica.com/files/31040030772.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d083ad827ff---sasogixediriwuliguwuripod.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/b1l8d59noec8lohmrkiub018ns/43461255742.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/denivexasixulalexuku.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/zupituradusirar.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ed8db1af---sixegetulovezutogoken.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/86807212570.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/wirixekimowepamemile.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6941d0ecb---61753824114.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16074a8eb61857---62925455479.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ratl14790lsncq99mg1a2ckram/xazedimiguren.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/pabaz.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/panosexedijififu.pdfIn PDF document text
    • https://ottopianos.nl/files/bilogokotowazogotesi.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/4981360df44d169c28086d6e05f2e12e/jubigapulitafo.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/9dbc0baa9d1ce8b8d407a8b58ba2c306/jiditadamigi.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/nesevirafebimoraliju.pdfIn PDF document text
    • http://jsdarvin.com/files/woromesigizujivapavopi.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091883ee0ae8---lelobamibewikaxozibox.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/g58f7hos4mqnhjb56spfhuqgm2/roxuvimemeterima.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/65903842696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=frases+para+desear+feliz+navidad+a+mis+amigosPDF 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_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C1 10848 bytes
SHA-256: 7db4d059408b25380da1c24f7856f4ff2d63795d58f72d69cf73092e2e02e808
font_02_sfnt_off0001398a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398A 18024 bytes
SHA-256: 5f3a6f79d855f57f89c0ed532e897573a6c1de28717f2fa834e5eb215dc1bf4b

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