Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04a0fe636e329c8…

MALICIOUS

PDF

97.1 KB Created: 2021-06-27 21:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7f5a4d2223509d367b0c37e97690cda SHA-1: 65cf087c5faf704ff4de2d5328f4b614571970cd SHA-256: e04a0fe636e329c855a183552451c3fde560ca3f1ed6e5247da0b8f8c6a012a8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc557e11b2---12092041543.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ioh0ctjf3u7f89m8n9c9ek728b/riworuma.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/0666ed894df67bf051715045c63e41fc/jiwojitalevifusewodovapul.pdf
    • http://kartywspomnien.pl/uploads/assets/file/tazevefunaroremojak.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/r1s8alj7m87u2elmrn3cp00ai0/80286615569.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa4df02cce---43528573680.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b87d8232720ba974004ea104c03eedd1/dalawa.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/9054703d98920d25bbd90d8543c00b2c/66509253821.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/tc6cbcihjeu2nrhs8crdlieke7/36079372796.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16080e019057b4---lukesiwunemaw.pdf
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/sezusojetusevipapipij.pdf
    • http://burchiellati.com./file_fck/file/79245375107.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b955126dd---78326161648.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/35a8c2c47290ad3dab7259182c68b32d/lorawezugup.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd0ac869d---woripaxoporokavu.pdf
    • http://bigsvatcharasith.com/userfiles/file/kiraduzewipusavesalimigej.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084f07bee995---timewal.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa04de6f932---vavulebajubijebuzime.pdf
    • https://akbaturgame.com/calisma2/files/uploads/reredibibikagejiposegopi.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608096e49618b---xujofuw.pdf
    • https://bursakaynak.com/userfiles/file/zapomid.pdf
    • http://mobilesamara.com/img/files/file/59002976393.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=written+interrogatories+are+questions+submitted+by
    • 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_off000119e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
font_01_sfnt_off000131fb.bin
8a070550c76de688c39a7945811d7fc035a81d7bea7d1f4716dccdfa36e52279
pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 11040 bytes
font_02_sfnt_off00014b31.bin
264950d7b61ea563392a46508b0803cd8bd6d3d48360b35852eac810d91317c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B31 17144 bytes