Malicious PDF — malware analysis report

Static analysis result for SHA-256 30774434feb873a7…

MALICIOUS

PDF

87.4 KB Created: 2021-07-08 16:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9aead8b28b67260e19b40dce2bfee8b SHA-1: 5c373a512333e44e2f1879e35296e62c8448080b SHA-256: 30774434feb873a7176781c6c222f31a5ee945342394a47faf0f6c08c9401681
236 Risk Score

Malware Insights

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

This PDF document exhibits multiple high-severity heuristics indicating malicious intent, including PDF_RANDOM_URL_LINK and SE_PAYMENT_REDIRECT_LURE. The presence of numerous links to potentially compromised WordPress sites and disposable hosting suggests a phishing or scam campaign. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 8

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://aaaexpressheating.com/userfiles/file/tenowupesaviwurugos.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5mcevmbiufcrj3adukgagm0qj6/rinamutodovepozapelo.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073c28b5ea73---muvorukojipaxedanaveri.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/6c7714cb14bb8225bbb782a38cc3e20c/reniroluwekun.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f83e615863---9858326010.pdf
    • http://www.zywawiara.pl/pliki/63604602237.pdf
    • https://marblobaths.com/app/webroot/img/files/86524286463.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa879b001e5---revokafopamavumawakopet.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/p148omo1tg29jnhj73cl1alvm0/6202843479.pdf
    • http://citra.cl/userfiles/file/maxobisowipufuzilitalinaj.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c539ec46464---4107613776.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aeefa8d0781---tivutovidegeripuk.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64918753344.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160984c0215899---44450871933.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/gidasufilakovofugagomevap.pdf
    • http://cy2hand.com/userfiles/wefavan.pdf
    • http://badaranquehablar.com/userfiles/files/29580861975.pdf
    • http://atut-biuro.com/uploaded/file/tadatelof.pdf
    • http://stalmost.pl/userfiles/file/zuterevekalavusajatofejob.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/69029865449.pdf
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/paxufepetavurax.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607069d9aa31f---dogib.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/ucrpn1bnuosulf62f5hrbbpgi7/memositad.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077f1c1841bd---16709476691.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/f0df91d8fea14f2d609feee1135421f2/tezigaku.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=buy+here+pay+here+greenville+nc
    • 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_off0000f2b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 16792 bytes
font_01_sfnt_off00010ac8.bin
946fd89d2206ffe55158d3edb74784ac3edc91741311b8335d5c4f22346444f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC8 10600 bytes
font_02_sfnt_off000122f3.bin
1d7c2c829247446849bf70081883df5602d2e4462a5945a446979c9c64b8347f
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F3 17180 bytes