Malicious PDF — malware analysis report

Static analysis result for SHA-256 a127bae604b1a544…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 14:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 440f471c805d20d43bbf15041c256385 SHA-1: 0e5506a3f848656357bbb2ab09f140d98724d82f SHA-256: a127bae604b1a544f1683b7d6588f1a2bb6a954daa614c9988a549e8d762f6c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://komputerzagrosze.pl/userfiles/file/zopijesuwosixit.pdf In PDF document text
    • http://www.tokyomagic.jp/images/library/File/90378581373.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/juzugibojegebakove.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/29247790572.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/tirufojet.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/301851367999.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/jtsdh27socndo73b3rtjpicsou/nikoladebamoxarijixibiwa.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbc2a49755---doxugoporo.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/f6d6674754b2841f47d55030243bf379/72059767428.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/palewexetivesixoso.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/sinojisivapezovigamagedet.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/84662893364.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/dozudilebajuvonidinaxokam.pdfIn PDF document text
    • http://berries85.com/clients/4/4c/4c86f126b1006e50d570d35f0f20b0f3/File/98297826909.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/panekadonevemokedonurixe.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/vel9arj095gd1272lugeggcbnb/14781460281.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/13701963058.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/xonagisubefoxu.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/mafoviperibopojapewa.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb639d82b2---dodaguzovununopugusozokox.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/34974417377.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/pimaledurodu.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/bonixo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f85b6274d---65862425023.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/8da25adee3a905e6d3bee938f216ea55/xijasanisafowelabekuloja.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/34916257020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=employee+manual+template+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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 10496 bytes
SHA-256: 8954a8a3ba7a333088cb095fedcf8cbba0aca93a27f1ed35f7fda3f9de8487ce
font_01_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 17520 bytes
SHA-256: 5583702edf99f675f1f7bf58b9baf7a245fe6f5945e115cd56a929f8c9911a5c
font_02_sfnt_off00012676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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