Malicious PDF — malware analysis report

Static analysis result for SHA-256 044fc26f7ef3fdda…

MALICIOUS

PDF

83.2 KB Created: 2021-06-29 00:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c853dde7ada4becc53419b3962d44ec SHA-1: 2e9407bf17812c35732a69bc9512d309cc1660c6 SHA-256: 044fc26f7ef3fdda0911466b0bb6c1b9d6591e04356e78c182ad53aa5c38ba8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea871d1fd5---jifesirelajukewumateri.pdf
    • https://a2designbg.com/userfiles/file/70189700704.pdf
    • http://www.vegagastro.pl/upload/file/54970958895.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/75577f8d5905bff20398c91ca92337e8/tisibomixoranakanok.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/b4fbcbd0a658028007c979ad9f5bb68e/nafevodire.pdf
    • http://elsekmont.eu/userfiles/file/nudiwemipokuxavogowenekiz.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/jkokcdencrggg6nnn8040bpbk2/58029041679.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b770d4e98a---56371214727.pdf
    • http://anhbanglaw.com/userfiles/file/kuvufavokuvixisefogonoju.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3385fdb9e1---juroxalopufokegokixisasor.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52e5c6293---57521087466.pdf
    • https://bataretak.com/img/files/file/vovivisijipo.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/hd3hh1glrk3ndrhhhafj6mncn6/pafanirakekezu.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16090e6e27863e---95778304881.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/bfcd9361fda09754632ffd64661e1a0b/dibulekisejevapefegajeri.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/716c39de04bbb74d44c1cb93ef35877a/73652811142.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/hsi04ovddcg9n1u5pk10pj6910/linalebavumuwexevinu.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/6f5ff20073647be5fb905dfd9714d779/11781277783.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/noid0q70ne626lbrgduregha3k/28454180984.pdf
    • https://suma.ca/upload/editor/file/83896916518.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4cdd3e5f---mumijutotonokowo.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/fkk26k7b448lkgokt1f13npam7/23730632516.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/8odf26fk67b2it1hugnifafboq/68709291583.pdf
    • https://erdemlerkoleji.com/resimler/files/34482388991.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=stamp+all+pages+in+pdf
    • 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_off0000e199.bin
dad63a36d19621826593dcd3372d7e4983858200584485f6706fb2415e68f7fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 16960 bytes
font_01_sfnt_off00010dbf.bin
6fdefa94374b522476b98d28c32b83d11b911ca7f6c29adaaf2c6b547b42bcba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 10696 bytes
font_02_sfnt_off000125ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125FF 16792 bytes

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