Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0572bcf494f946…

MALICIOUS

PDF

89.6 KB Created: 2021-07-01 16:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abb243ad35c6fc0ea1c0720ce7521dd7 SHA-1: 281113dbada7694da29878cc97314da01bfd22df SHA-256: 0a0572bcf494f9461ee0ed8a1882b6eb584164d2ef266d6a754c9fa091de54e0
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/8a0a50f867d99b1cb40d1f32ccb805fc/zabiponidanurisogir.pdf
    • http://www.findvoters.com/userfiles/file/nifopulizezununovadexili.pdf
    • https://summit-christian-academy.com/scauserfiles/files/mabupalebebo.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba93aded0---84156829375.pdf
    • http://karate-talence.com/newsite/userfiles/files/99323788823.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085748eebb86---gidamiret.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/66de62b332e54a261126bc808347c995/giwidi.pdf
    • http://imssp.by/data/images/fxeditor/file/legatevifalo.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6e1d0cbdc1dfb5ddeb33583f91dc20ad/giwenewebodimakefejer.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf53fcbe3c---54601870509.pdf
    • http://haiphongcontest.com/images/files/megujevol.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/93b91ca9efb0908e968d6d21d8229ed8/93105161051.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/minatoluribalobofe.pdf
    • http://aggengr.com/uploads/CMS/file/9488423807.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/0s9rs8qc83ptc2ojuamf162jhk/kakowazopenerojiw.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/thiejg4gl0bqu5i4odg6lep3s3/50556219788.pdf
    • http://henca.com/files/details/file/61527575876.pdf
    • http://ekolojikweb.net/upld/userfiles/file/38414336203.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ae03934b4d92cced619e32472482c741/12513165194.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/q3gmsvrggk7cmup6ufeo8642hm/milisatibigesepisabajen.pdf
    • http://csc0451.com/userfiles/file/20210608071817_fs9lo5.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/434679b3705f11d95df3fe4fd863af10/daputivafizeriniwez.pdf
    • http://3xlove.com/uploadfile/file/gavidugidasevezifelodelu.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ec65khv4sr3vqil72c9trlp4n/ramanometo.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160759afc01188---32059733165.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e0e0225264bf998fe878c17819bd40ec/30158208979.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d83ccfb2654---17296252354.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=i+want+to+flirt+with+you
    • 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_off0000f99f.bin
ef593265e5e7b7aa9b0df05b05172a57767d55530ce38fdd4d0f7014da77d173
pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 18288 bytes
font_01_sfnt_off0001286c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 16792 bytes
font_02_sfnt_off00014083.bin
813e65e022f4ac22173bc73c0d6a4a8378fdeb38fdc1192a425fc6d17f171678
pdf-font-stream PDF embedded font (sfnt) at offset 0x14083 10260 bytes