Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2062413104ddf8…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 15:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e610b3d972a4bebd43ee52ec3c5199e3 SHA-1: 617866646588f69b33ecdd615c57006f47181e05 SHA-256: 2e2062413104ddf8a4df594774dd1310bcb92783695a34952d708c39918d42b4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a distribution or phishing campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded URLs suggest an attempt to lure users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/8b7f60ba7645d443940f49d584234317/memujetirozijofixowan.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613b89664117b---pozoje.pdf
    • http://meta-min.com/files/xiranesuwilezoze.pdf
    • http://gift-founder.com/archive/upload/files/29537031692.pdf
    • https://cncunse.com/d/files/pixivagagoponinino.pdf
    • http://bancasemecanino.com/userfiles/files/73341323868.pdf
    • http://health-bridge.in/upload/file/69819103652.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ebcb60225---pozakazejusutufodaseja.pdf
    • http://danchrisjewelry.com/userfiles/file/81413193241.pdf
    • http://coyada.com/up_images/up_images/bapegijurokawugidasovisev.pdf
    • https://ichibaninfotech.com/ckfinder/userfiles/files/wofuwubivofigilip.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319b21975ff---dubifabujitotariro.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/161417797b2c10---tenikokogexixanajukezefom.pdf
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/kizikitenibemalilovedu.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/707e6ffe66eacdc3fa32c8a91ad02c4f/19259355516.pdf
    • http://kmsenior.org/file/files/putalo.pdf
    • http://rc-mst.com/mst/_upload/files/bivabavamawasef.pdf
    • http://synhbio.com/upload/files/68476225776.pdf
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/pugutuxukonodazowuxusugu.pdf
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/31024766772.pdf
    • http://bainihu.com/upfiles/editor/files/37846027970.pdf
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/66621033228.pdf
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210905212954.pdf
    • https://larrialdiak.es/files/galeria/files/fosimovidegulisavagade.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+open+msgstore
    • 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_off0000e0c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 16792 bytes
font_01_sfnt_off0000f8db.bin
fb884536f50f5d437cd30a5eeed23beb8f127a4d878ce8b0488a98602ad927fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 10372 bytes
font_02_sfnt_off0001104f.bin
2880068e6c073cbecca54751c742c3b22bbec7db2bc0568a796ecfd6dc52e265
pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 17120 bytes