Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c25ce8fe2db985…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 02:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2603278315d32c962d1c305cceb850d5 SHA-1: 046ce3af139f27c86dacae3d735b07a8c22d38f1 SHA-256: 38c25ce8fe2db98506f3cee4a92b36d579ce444c893f8337c3eadd2f6a5bb946
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload storage, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the classification as a link farm, likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b82a47e98---kagopekoxorutuditeginoke.pdf
    • https://bloomland.com/sites/bloomland.com/files/porogatejadowabixakutobim.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/14813471181.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/efa33faa2d38087d6f94f6df7fe1dfe2/firosepewuk.pdf
    • http://abwplazaview.com/uploads/files/fofoxakomudaxoj.pdf
    • http://classicalgardenornaments.com/uplds/file/65924961694.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/tdlfskhdvuc0kmv076ubffbj51/xekidoxabogedegazife.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ee542b53---56742406482.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082442ce8b24---fegaforeborakinimilak.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/puvonidewaga.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/aujhhljmrbua96q6pb2p5gekks/guvakokafijavavilutukibat.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097966633727---rujenexuzudajoxanonivezal.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/qq4gkm8l53fc8hrf9ltesm17bi/61303322607.pdf
    • http://rafaelokazakov.com/file/pobivotezubokufopovogate.pdf
    • http://alrabbancapital.com/file/files/tejavowekewovavoworew.pdf
    • http://fujavietnam.com/images/Download/sewivomatifuwonu.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f3c700b67---widoxekeviwozenanubewo.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/3aipic43j7cmtousp0ebo3j9u4/sixofizuraxal.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608940cac0b74---21252856269.pdf
    • https://pmsp-me.com/userfiles/files/39416845935.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/s626e9kb9dhb42lmjceepno2u5/92755504424.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/91obphun00gje63via7dj5i66c/logijaneporexavotoro.pdf
    • http://m2m2design.com/userfiles/kiweladu.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8deed28937---teredujilukexolewo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+do+you+call+a+herd+of+pigs
    • 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_off0000ecb9.bin
6eeab16626d8735a9aee7357116ae82df6ff06b2f81278ffba1efdde9a82f2cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 16392 bytes
font_01_sfnt_off000116da.bin
cb900afb23f707d01c4926ecaebebcc26047886fd9e3cc53d4eea08b0a20ce90
pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 11000 bytes
font_02_sfnt_off00013062.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13062 16792 bytes