Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0d7f5af2481630…

MALICIOUS

PDF

96.6 KB Created: 2021-09-06 02:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 44baa6b314aacbabd82b6f1b3f4899a4 SHA-1: 95088c6013a64b437fa5886d454ac701a9f4b1b8 SHA-256: 2e0d7f5af2481630f3c90b60d483f87c58830e086ae8bbf2839ae18f1e718b5a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of links pointing to external PDF files hosted on various websites, many of which appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of malformed streams and link farms suggests an attempt to distribute further malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 https://laserbeautymachine.net/d/files/57348977038.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad7eebc099---bagixinumatovufebez.pdfIn PDF document text
    • http://dzbnf.com/upload/file///6401309450.pdfIn PDF document text
    • https://isleo.com/i_photos/file/79056571702.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/pivixaf.pdfIn PDF document text
    • https://invest.pl/userfiles/file/xojoxobu.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/woxib.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/31064946462.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/bupexalukajubarewotiduwow.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/33328099798.pdfIn PDF document text
    • http://coolscape.info/images/files/29842771558.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e75b4edec0---71239629109.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/bdf571cadc9c350170f5f7b7d3574871/zejoxis.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210825051300.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/905a6e335f6cec68dfce32aa5aeb7105/xegixek.pdfIn PDF document text
    • http://clingac.com/d/files/11080097266.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/70928601211.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6733f5a1---14514857614.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a14b6fd559f---ramikidujusipijena.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/piparurove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=dictionnaire+de+theologie+biblique+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_off00010a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A06 22336 bytes
SHA-256: 2da4c4f1bc6b5d357dae8fe54a0346df7a37a3f98e6f96f58ba3a0eea1aa38b4
font_01_sfnt_off000141e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159FE 11120 bytes
SHA-256: 896e9d9c022c54a15f71737ad30827ae3fc63be3618bb0c00c2f42f690cbdb16

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