Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eab6584a7a39ad2…

MALICIOUS

PDF

101.8 KB Created: 2021-07-14 03:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cea0aa4915d49e3f44fd2d375cfe5f0 SHA-1: 146d180a880d7b52a5b400bcd0c4c4dda5fee2ae SHA-256: 5eab6584a7a39ad2ff000d557273bef4fdce8f2f456b38699ddd2068644abf41
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b1fc85faf984fb8f7741e8f1d60eb6bc/mipeniz.pdf
    • http://mkngsp.ru/upload/files/bevelesalutozewitovuzote.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609feccce9a7f---risebibelomolatik.pdf
    • https://tlproduct.com/userfiles/file/pexulizif.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/80f6dc60a8b7ff15fa2dda4b54e82722/vefukoborileguwexijebi.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/67325365599.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee33b8011d---40420132084.pdf
    • http://barsugo.com/ckfinder/userfiles/files/38707264539.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be39aeb8d6---25605908923.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/q83j8m8ctlvfgqlj5mkb6ild22/11172963536.pdf
    • http://globalquestconsulting.com/userfiles/files/rikidu.pdf
    • http://quick-thailand.com/images/uploads/file/toxemadusuzenubalonema.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb87dd21a---83209991999.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ca57f498ffc---35814262253.pdf
    • http://asbufestival.com/uploads/FCK_files/file/lozopozonumopigusalok.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/a0878a9b4e48b488a23fa8a70477518b/4952600220.pdf
    • http://mytaylormadefamilyusa.com/clients/864113/File/topenudasukigiginidesa.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/93bfbbf485092bfd2223ef19228a08ba/53201391391.pdf
    • http://hublihorse.com/uploads/userfiles/files/65363391458.pdf
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/siniv.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099ba2eeac25---85128902334.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf89b299cc9---68985990898.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+lcm+of+7+8+9
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011248.bin
70f82a601682f3c83d5cb3cc7284a54f9a5f13f4a5856c9749b2bdea88ed69cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 18228 bytes
font_01_sfnt_off0001432a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1432A 16792 bytes
font_02_sfnt_off00015b41.bin
a83d4f549336e601042e5b04133ecfe1482b978b10a8c5ed46bb46786e50501f
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B41 10816 bytes
font_03_sfnt_off00017450.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x17450 16084 bytes