Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cadd6fc4b85b4e…

MALICIOUS

PDF

87.9 KB Created: 2021-06-30 18:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86a9328583143f90a9dec5c4c78e7efd SHA-1: 3ee5d51378b99940ec83fce933c72cc5e975a819 SHA-256: 26cadd6fc4b85b4e424a0e09ce5cbefeeb10f3769e14ec25e69625107666c0c7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple links pointing to external resources, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript and external links suggest an attempt to execute code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sevimticaret.net/userfiles/file/99704495620.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093233dbaf11---53747858731.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/273cfee5c225e0ed5322a30eb32b064b/bebemimibafetumip.pdf
    • http://henca.com/files/details/file/26658177253.pdf
    • http://garagehayashi.com/js/upload/files/79938474607.pdf
    • http://portalcom-b2b.es/img/user///file/_0750977001620184993.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdcb19e54---11866230290.pdf
    • http://solmoda.it/userfiles/files/gexegojejofurexoje.pdf
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/pipozelinomomabewokonoxu.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ad833cdc8a1---runaxosapatefuninesovi.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/437fac6b6ba263216b85b9630fa64088/42563279184.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079177902eb2---dunewipuzobe.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160706a7dcd393---79599125908.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c789e3660749b8c6b0bb5a244b236930/65303705133.pdf
    • http://studiotecnicoarduini.eu/userfiles/files/vusozot.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/14ffc1824d3f83d4fe68d14958d8292f/wurafetab.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/ulrc980t5535hga7jt06iopn0n/78626185797.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea56644ad4---14345531629.pdf
    • http://ahxxzx.com/userfiles/202106/file/sasazor.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160936bb078e1d---fonezidinelokijewomivove.pdf
    • https://mn-lawfirm.com/box/userfiles/file/fukov.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/gv9eb2s85atbmqocr3futafeg6/kefitebemisorujakunutezog.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16071e23f5fad4---bigoxetegixazige.pdf
    • https://www.alapan.org/fckimages/file/tudijodo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+saturday+songwriters
    • 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_off0000ed7f.bin
9079e8d5e8e73b1f52edcbb177f4c5551b2d22341936d096fdb891fe5f4a4524
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 19908 bytes
font_01_sfnt_off0001203c.bin
e4696d5d11bf83de0e72e475466bdb0ff3166b413ebb9b229215f4d455664990
pdf-font-stream PDF embedded font (sfnt) at offset 0x1203C 10744 bytes
font_02_sfnt_off000138cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138CD 16792 bytes