Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c647eb90f0c7f3…

MALICIOUS

PDF

74.6 KB Created: 2021-09-05 01:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 864a42d4fab9bc319eed6afea091e78e SHA-1: b204d0218f2651ddbd16266b4df4568cce4c60b0 SHA-256: 30c647eb90f0c7f3a9ee3d1a6458373428a6b691461a8c2c4912001927bf04c3
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL distribution suggest it functions as a link farm to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ae1dd2fa732c369b9da7edb6e53f8fd9/dixefetafip.pdf
    • https://renhedc.com/uploads/files/202108191347103210.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/k7rc7as1lpl3irg5kipbcbaht7/tedisogotofobejow.pdf
    • https://atvatextile.com/upload/ckfinder/files/rujizid.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/fd98693f831f53e4c5aff285fd864714/73408563899.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8639407a92---rukipuje.pdf
    • http://hyswimpool.com/userfiles/gisadupefelifopiduke.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/53210514039.pdf
    • http://sartor.ru/upload/files/3920279578.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/d8f9e6d6dbf79f95a537c9275a9b0c65/89983818551.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aa35286164---dobetabefejalubade.pdf
    • http://bahattinburyan.com/userfiles/file/zikilot.pdf
    • https://istocdukkan.com/userfiles/files/zubufukisivifer.pdf
    • http://kronospan-mofa-hungary.hu/editor_up/lupanaxozoxudepad.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f63d8c14e---vugagagadubifegupijupuna.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d443581d9---3227964340.pdf
    • http://fitviewer.biz/files/file/budetepotazazumipikised.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5f5e52f69---78710733307.pdf
    • https://mimpiindah168.com/contents//files/dijibifelojigag.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d4df93873e4afdbed6f29dd72b7dc3f4/wuzasebipisodiroz.pdf
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/mujosozelabi.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/wategubidujitirapanubumes.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129ce50ab24b---66322945404.pdf
    • https://4of100churchstreet.com/assets/media/files/5597843723.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=manual+de+usuario+galaxy+j7+neo
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE41 16792 bytes
font_01_sfnt_off0000d658.bin
4d995566921023ea158ff4ce1bc18596ed523781067a88ab9cef5e898d67f1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 10816 bytes
font_02_sfnt_off0000ef2d.bin
7015f55802a3355442917bc97d3e6afad1829c6349c332296a10826d6b9adc6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 17636 bytes