Malicious PDF — malware analysis report

Static analysis result for SHA-256 be04090517d82104…

MALICIOUS

PDF

82.6 KB Created: 2021-06-29 01:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4ea5e801928ad2803ca82bb7f5bbbcb SHA-1: ed1cfd4f415fa7dfeab783b8c6e03759fe5dbd76 SHA-256: be04090517d82104bba7b819da09eacff7eba36765118bac596c0a800cd84aed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160807112366ff---filemaginorajufefizo.pdf
    • https://powermailer.in/userfiles/file/gojadalugil.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5dbb0d6b3183be522844cc71e4139891/30748386417.pdf
    • http://vo23.ru/upload/file/xiwuton.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e5a33452a---xoxanevawawipidav.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/4upmj8qg6jvh4kpnbphnu5b5sg/91912801394.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/gi7ecd50cn9p02iq37mqbvnthu/zilovozupixarafa.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a706944d7---44330635507.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/cj54bh2u8v60abfgajrqc8go7h/zefamarovoxebexitule.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/e3eo0s6doco3obe95qfqtd2v4e/28846816820.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/4vi1ojidsdopr75md3to6lus82/12755522729.pdf
    • http://bjhtdszdh.com/v15/Upload/file/20216132012166914.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/3ic0plnmvedqtqch9054q8cml5/nowoxajajobuzakupenaz.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ri82ol8hsfr78vmr0iss6t0ab9/84559077825.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/42f419528201d61bfedd3b481fbfa7d0/78295924267.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/jhim01dm8v3sq8vl489ltjch2l/20446903936.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/731b901b0827225f1c321ab9be65d966/berikogiwezatazigedire.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160983bcf21d58---17186899639.pdf
    • https://albawadiroad.com/userfiles/files/3616317388.pdf
    • http://fedoro.ru/upload/file/79374705602.pdf
    • https://dm288.rs/slicice/file/33802228373.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5f1f29ba---disaxuniwulotoxa.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dad8d120qbunhe4om2h1p9bh2/buxedigudugula.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=speaking+topics+for+ielts+2020+with+answers
    • 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_off0000e055.bin
34c43f6378434c67f5cd4bde9f137109fd5c1be26463039a04137c87544c0cad
pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 16160 bytes
font_01_sfnt_off00010a49.bin
eb4b4bdb0a31fc247943db66a7f78a992c3ac4456d72eb480350ea01f039453f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A49 11252 bytes
font_02_sfnt_off000124bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 16792 bytes