Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29621c1234cfc96…

MALICIOUS

PDF

84.8 KB Created: 2021-06-27 10:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdf92a46cb0ec91ae60cfa92566d4efb SHA-1: 6e972f620e647c17ee74a488a7b3d1f13d0f3f3e SHA-256: d29621c1234cfc9611d6b3240b322c756cbb3f76c5a162dba53994ea75299e94
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure as a link farm suggests an attempt to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608219f0c30ad---96342064819.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607df5223641b---pegemetevokul.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6830d5961---pulokutekeruro.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b5bd1adc4---xeledaranepisa.pdf
    • http://adveotec.com/img/file/vusinerazojagegixav.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b448e08aefe64d192c31a79f015b679/57118541706.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c47ff3406c---najovanorigogogosegamaxu.pdf
    • https://samarpanbharat.org/trila/userfiles/file/sekojapaxorep.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/k2hscsbdmptuhfraur29b05e20/kiwasepuzarurupabob.pdf
    • https://rm-parketi.si/uploads/60836572406.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/049a1cb59c292e5b1e0acd812a255f40/24374194597.pdf
    • https://ecohort.info/userfiles/files/vomitinoj.pdf
    • http://maxtarget.by/ckfinder/userfiles/files/kuketifatoji.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gawojavebufulazafamozole.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/f0bdda1d6cc86ea73b7b17f554daf8b0/25203680945.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/03e8ec06eabd01fd232231be42388bc1/xorebejatekexokal.pdf
    • http://influences-vegetales.eu/assets/Image//files/23022751581.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608000a1541a2---61568850438.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e232aa8ee32d6978d3364521c5a5db09/dofuwasipu.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/ebvrbtj2bohqb80um0bsm2efmt/wakilufafatujogixibovu.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/e58pposbtd4fiedmejd1pgf8bo/fabefipu.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/53545ed574de15e86ec532863c27550e/sopezop.pdf
    • https://alternativecarrepair.com/userfiles/file/80329242753.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=life+cycle+of+erythrocytes
    • 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_off0000e9b7.bin
7e363031d79c634aa4e1074e0ce238edd122e50ac856bee7623964fce9df37d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 17512 bytes
font_01_sfnt_off000116d7.bin
48b83be865d6012af2f9e2dbde71107dc8f0c10df959cd73de66d54d3dd90d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x116D7 10240 bytes
font_02_sfnt_off00012e00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E00 16792 bytes