Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5469e7193d6427…

MALICIOUS

PDF

80.5 KB Created: 2021-09-24 02:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 396002e597c1cf659b71017626afacfa SHA-1: e94f1455400a85dcc02fb0b607300e5fb7a76a0d SHA-256: ea5469e7193d64272ed06efaa349d669cad235bd0cc1b7a445c0a98c04811ea9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://baby-daycare.com/uploads/files/202109202004356795.pdf In PDF document text
    • https://matrixx.lu/images/tugorisaxed.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/lomekar.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/56215504596.pdfIn PDF document text
    • http://thueotodn.com/uploads/image/files/4354799022.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d25159018b---zagadepafir.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210914092238.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/36622938380.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/mikexesak.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/be5i5veqg1m1fnelpup79tvr22/rowizuxo.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/jupenukesubid.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/zavojixufajub.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3a27e5ar99metm44fer78b38c9/gafelobufofo.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/gigibopipejako.pdfIn PDF document text
    • http://1careglobal.com/upload/files/likixaramefowijedabufu.pdfIn PDF document text
    • http://idroter.org/userfiles/files/1442709556.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/kapununekamonoruja.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/366e78990398418b533df013cb379679/51046592642.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/bexejinuxajelofapesepa.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/dexakegopapaf.pdfIn PDF document text
    • http://balbu.eu/uploads/news/file/5912401621.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/11965415371.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/88129086617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=west+gunfighter+mod+apk+android+1PDF 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_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 11136 bytes
SHA-256: d12899d991d49dda54b96978227070e6e16ac66500e088bf19d91f555c1e5957
font_01_sfnt_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 16700 bytes
SHA-256: c6d9f7968b0d46e311aba14f9cc13aedb370a13f99c120f7b7a4185c31acc567
font_02_sfnt_off00011c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1