Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecbe7a0aad90c94…

MALICIOUS

PDF

91.3 KB Created: 2021-07-06 06:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 315dcfd98f45bc957145ab3095bd831e SHA-1: a78584579d0f02449b0a1a6e7cbb756d71953579 SHA-256: 6ecbe7a0aad90c94aea53705f20d322f0b60dda964b15e239b1edba58efd93f4
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the structure and URL targets strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/b9o85r8bmmurbdhsnoinnhnfh4/57187844872.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa74e6df766---lemidovanapipori.pdf
    • https://steklo-shik.ru/userfiles/file/nozadewobozuvej.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e83c217174---36361060908.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/skpkcdfstteuqtb6o6kbc48uh1/vogaduvuzikunoreguduka.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210524023124.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160d24baf2a579---66881375176.pdf
    • https://nguoixunghekiev.vn/userfiles/file/94667423258.pdf
    • http://jarosi.hu/files/file/42953707486.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd6589fcfa---95475008959.pdf
    • http://highspiritsmusic.com/ckfinder/userfiles/files/doposukeragudubibukexo.pdf
    • http://honghuibio.com/d/files/fukukekivubakop.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16087fc898aa1a---potawolanokin.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/g03uqg22hm326gb9hd0ddsgbbf/xuwekesilaretup.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1541db81a14fc139cc7b300de796fc06/pukakelajananamexekegusu.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c7e7c5df---nunepajobejizinajepu.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15e59805ba---legudejavibepate.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/34048744376.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608204c51dbd9---37196214676.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/5fddca4155c4e97d7ed416afd362f913/disiza.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/2f0dc440ab07340886d2bce3b5cfd8d4/xupavubodewuxogetonafu.pdf
    • http://anhopphat.com/uploads/files/zegeligurom.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4992a7c6---84447048536.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cf2874a4c---29072297336.pdf
    • https://hasekei.jp/userfiles/file/22688406429.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/ae77f78318635b5bfcd0cba75e178d5e/19894789919.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gta+5+online+how+to+make+money+with+bunker
    • 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_off0000ff37.bin
1cddc621bbafe26d219353cf113dbb632a3f6afd3d54db6ceca2abafaa0afe64
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 10908 bytes
font_01_sfnt_off0001185e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 16792 bytes
font_02_sfnt_off00013070.bin
f1bcb4593a90ab170b1b5d0f669967d3bd568d8c35a6f09d80415401e4691731
pdf-font-stream PDF embedded font (sfnt) at offset 0x13070 17388 bytes