Malicious PDF — malware analysis report

Static analysis result for SHA-256 90788cbeae4488d5…

MALICIOUS

PDF

96.1 KB Created: 2021-09-14 06:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 84d0a2728891b67ed2b905c646926cdf SHA-1: 67251f9706e654d3acdc1d55e13f38744f79a45f SHA-256: 90788cbeae4488d5922a374ced6e6e6beddfb79275012b12a2b4aee65ccc80e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=bhagavad+gita+gita+press+telugu+pdf PDF link annotation
    • https://darkoyunpin.com/calisma2/files/uploads/8508539728.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/zitikabesewosukaruzesele.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/zorolakejazodinumibig.pdfIn PDF document text
    • https://kawanmto.org/contents/files/pizemivano.pdfIn PDF document text
    • http://zuche0551.com/upload/file/70831808441.pdfIn PDF document text
    • https://bor-diing.com/upload/files/46325628710.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/lolifokidenafebim.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/vezawevemeduvifup.pdfIn PDF document text
    • http://limoride.net/gallery/file/50490044922.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/garinafaxofezuganubijata.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50948836810.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/75986890981.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb1af48008---dojeserajawuta.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/fawato.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/74427553349.pdfIn PDF document text
    • https://fishboat.hr/files/donuzelezajata.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/tesotuzesijenonizapiwite.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/99945123450.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/bufiweju.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/41573578530.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210914023214.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/rajibawiwumafagewa.pdfIn PDF document text
    • http://e-district.org/userfiles/file/dolifow.pdfIn PDF document text
    • https://tonitomov.com/picture/file/59231628993.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a776990d1---lorizuvapumifunaje.pdfIn PDF document text
    • 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_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B67 10772 bytes
SHA-256: eca6b5a491f5994c4ac74a260f8bb0da423a4f85067ef878e219be1b24b40ea9
font_02_sfnt_off0001342b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342B 24128 bytes
SHA-256: e1be31c4365fef29936a5e036410805c0404746e549a3db09d568e69d400072e

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