Malicious PDF — malware analysis report

Static analysis result for SHA-256 07214bc8b5880b88…

MALICIOUS

PDF

77.8 KB Created: 2021-09-18 11:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67c7dbc2f854b83ceb2462c0ecebf0c1 SHA-1: c6d0fc03f9f78a8f878b74b5ca6d502c616350ff SHA-256: 07214bc8b5880b8853808785cb62775877984b5603fc23da25ccaf4c10d89aa9
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple external URIs and link farm heuristics confirms the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://jshanwoo.com/ckfinder/userfiles/files/16150031063.pdf
    • https://taptigrihnirman.com/singhania/downloads/file/1598490768.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613d426d66ae7---zogoverixipu.pdf
    • http://tinavaron.com/ckfinder/userfiles/files/83478049503.pdf
    • http://law885995.com/upload/fckimages/file/worafemikukagejafat.pdf
    • https://ijp2.com/contents/files/jiwazurukaxi.pdf
    • http://ornito-silesia.eu/userfiles/file/92903851520.pdf
    • https://officialbacknumber.org/editor_up/28546865620.pdf
    • https://hr-serdahel.hu/images/file/69344128184.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16133b12595c53---2372107603.pdf
    • https://iphone-odklep.si/vsebina/75899451083.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c3870f0592ba46e1cac0ee174fcdc7e7/39716751806.pdf
    • https://stdtekstil.com/upload/ckfinder/files/bunaburirusikaxigufadiv.pdf
    • https://beysukonaklari.com/ckfinder/userfiles/files/34423036208.pdf
    • http://criminisiepartners.it/userfiles/files/fugegixuwop.pdf
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/moteravozexuv.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/j9t14i504vaonqpjj6m6kddg27/kodetipin.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/p2iup8c531sn0p06tqd1v1csta/xusatef.pdf
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/33796377751.pdf
    • https://webmenuplus.com/images/file/xibuk.pdf
    • https://tidurmalam.com/contents/files/13943740019.pdf
    • http://sysquare.com/UserFiles/files/sosibewevepepuzero.pdf
    • http://partnerplus30.ru/images/fornews/files/dafimuzatekiwagudi.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7n0732p942m43oursoqj9n7db6/18946994150.pdf
    • http://bettaletroom.com/file_media/file_image/file/19250650830.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=punjabi+song+download+mp4
    • 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_off0000cac7.bin
a6392361b12a27aafd5c4505ea3fdd9d5820ab165dcbab6427fc48a1984790b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC7 10940 bytes
font_01_sfnt_off0000e3b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 16792 bytes
font_02_sfnt_off0000fbc4.bin
0b98f2397c5779ebee03a24826afb3e7f65134f7fa730a3778f6851facca1101
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 17608 bytes