Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f349fbb8a3a6480…

MALICIOUS

PDF

97.1 KB Created: 2021-07-23 15:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c601047708415072050acdf90b806bb4 SHA-1: 8fbbef647700a2925d18de1dd7ee9b13c21a39a0 SHA-256: 7f349fbb8a3a648039557e78bdc29da7309b8d28c7e38c6d0de2354109595041
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known malicious document distribution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20e87f0caa---5622977103.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7a9a36661---4043337526.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2092339e9c---45029585524.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6465ecb55---75623080490.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb44c25bb7---ziwejotetalozefefup.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce50f29bc---89987228310.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ed54aa86d---vanawijog.pdf
    • https://multimetrics.com/ckfinder/userfiles/files/94931356524.pdf
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/11316449679.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a4aec61a604b3714ffffd9862d683d68/80270221987.pdf
    • https://ajitcoatings.com/uploads/58956541128.pdf
    • http://el-system.jp/uploads/2012/files/lolunagepavigiv.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ff01059f8935c6f682cf72be2b61b959/26302466128.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9599af2788---zojike.pdf
    • http://jshtextile.com/UserFiles/file///bijadoxisisupolok.pdf
    • http://studiogallerani.it/userfiles/files/wagotuvozoposumof.pdf
    • https://c-effeimmobiliare.it/file/botiwo.pdf
    • http://sobinco.cz/ckfinder/userfiles/files/66208488269.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608169d333e26---56999963247.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8925d287d22a7cda2c4b9dbc0315393c/damusubokenolejoparudu.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791cde91760---romoloxomozisitavoga.pdf
    • https://oddluzanie.net/userfiles/file/sabejetajesorimemeg.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/7ra2131bdd82sih0fb227ahepo/25636861558.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/5uo9qlr9p96emq220oaij5dfa8/65249051547.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cat+quant+syllabus+chapter+wise+weightage
    • 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_off0001173b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 16792 bytes
font_01_sfnt_off00012f4d.bin
1fb85e73be0306ac4aa44bcbdad2aa469a6640539649a4108bab9c6bcb69296d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4D 16784 bytes
font_02_sfnt_off00015aea.bin
deafd361b2b2ec00679399a7b2443519f97961c5d15a3289020bce84eac9a034
pdf-font-stream PDF embedded font (sfnt) at offset 0x15AEA 11152 bytes