Malicious PDF — malware analysis report

Static analysis result for SHA-256 276a8e2c318a1875…

MALICIOUS

PDF

77.4 KB Created: 2021-09-14 04:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e532d38f87d71d649dc2a35b0e16cd03 SHA-1: 50db158545c9b36fce3792decc371ba863769c94 SHA-256: 276a8e2c318a1875ae534f52cea92204f6969ef61e286f300af48d815fc22982
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://namratalakhotia.com/userfiles/files/44751064248.pdf In PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/17720883693.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/63262980098.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/sanipavasitem.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/2922712764.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/gusedaruxowedabikuwajurox.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/39744910823.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/1261216411.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/66033569929.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/39724367029.pdfIn PDF document text
    • https://negaratoto.com/contents/files/pixerawanege.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/pupexasubigewiraz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613387b710d17---divadejejeranekutot.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/74416332661.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/89063190569.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/pukawemajobozodaziweki.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/bokikutareludalovisuxade.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/jawalaminojenijam.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/34491602215.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/58931455680.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/tejutedefumaxesatumilujoj.pdfIn PDF document text
    • http://sokole-tps.pl/userfiles/file/mivolunosinajiruvofi.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/kilagexilalofudinizudeg.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/28527101350.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/mobufitijevogovipesum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=instagram+x+apk+downloadPDF 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_off0000caa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 17264 bytes
SHA-256: 9c75e6d460bb2370e905b5bdcf9ad1e5034dbe2dad3ef2bbc360f58efdabdb62
font_02_sfnt_off00010f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7C 10740 bytes
SHA-256: 92ecd8ea968b8d10c4957caf3c1a358eec03b6ccbf6c2f696df97710f7047588

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