Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a76236050f886c…

MALICIOUS

PDF

82.9 KB Created: 2021-07-02 13:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 043e5d0a0fd345bda6f2d9d4d524bff7 SHA-1: a5d400c3d4de607004cc7c468e3d0f6bbb858609 SHA-256: 09a76236050f886c17d661ab350f228fc5a4ae9a7a5d915921e7ce27dfb0314a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718a80aaad5---jupigiwemadatukuwovupaba.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da210319c8d---powutozabezosifagifuku.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca00d1b5c31---71179241779.pdf
    • http://www.srijonihealinghome.com/fckimages/file/mogemokazezexabini.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/a9883e5dd5c81f63dd56fa0dfff5ef8b/64470525800.pdf
    • https://ctapigroup3.com/contents//files/fataxavalakijaga.pdf
    • http://ropesadventure.com/d/files/41353910530.pdf
    • http://bike-aholic.com/UserFiles/file/satifetilegunug.pdf
    • https://defaico.com/d/files/8407461711.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dc7b817d103---rivowugomegepura.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608249c92f1b7---setafesoxevo.pdf
    • http://debeleven.net/UserFiles/File/10410586282.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/oqna3mcsaq5o98op6um5t6ikk6/tekavaraliduzelawulira.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/291ce990478cf07353b1c99e7d2a1fd6/xuwadi.pdf
    • https://moscowfashion.net/content/xuploadimages/file/26352736943.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/24de927e237eafc62fea407150d27918/98501401258.pdf
    • http://evevoyance.fr/adh/.-/file/xibar.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/14et748t65qjctjqlfd1oo84op/givafibudo.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094821ddf137---tazunexokimajeruzaponeja.pdf
    • https://scapetime.net/images/website/user/files/tukadixavajazetogek.pdf
    • http://www.shadowrangers.live/img/files/suboximadidinizegikopuw.pdf
    • https://cafesca.org/ckfinder/userfiles/files/54644513176.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=organisms+that+possess+homologous+structures+probably
    • 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_off0000e296.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 16792 bytes
font_01_sfnt_off0000faa8.bin
61e1c5eafff2f49d18069915e4cad596f69f0ea7a863ec5d6d7e69a2d5e4ca30
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 16128 bytes
font_02_sfnt_off0001240c.bin
2b599bf7ba5f279bb9f20fd0c73488ea199463ac8876aee96afc641bfdf010e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 11200 bytes