Malicious PDF — malware analysis report

Static analysis result for SHA-256 daee39fc6b919b21…

MALICIOUS

PDF

91.9 KB Created: 2021-08-09 20:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b42034f9d3ae780eca99339b9055cde1 SHA-1: 1eb25992e933ca2c7d5603f6255af1f987799644 SHA-256: daee39fc6b919b2102db9409519da67fc92e9e424afa34a1b6eb90d49c4625b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071456b32a3a---fitizipoxepufoki.pdf In PDF document text
    • http://protok.pro/upload/files/tinibevofamodi.pdfIn PDF document text
    • http://guowangcable.com/d/files/60725346443.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/mawowobovasixugap.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/xofulik.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/70859901186.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/fujuzizokejatiwimapaxabid.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/senunazagudijab.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ai27digmhfl287t27h6pq92cj7/lesapamolegepofasodez.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/zumujasevubulagolif.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/4vicgrmk41e1truv8foqgkel3r/30436892110.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/hsfak2ovmrpkqrj8tre1o1o8nn/ranilixibexonetefa.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/658c0c38febd9a4534649d64215564ba/72863009991.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073c3d047130---gadopasiwolane.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/90896707079.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9ebaa1c36---51952041370.pdfIn PDF document text
    • http://annabarons.lv/files/files/58258215043.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/65410690552.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/58m1jpda0fb711dmakolbgbmbj/61524502116.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/3ebdef452f99ba4363701a563441b2b4/712039023.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607603e6cf8a9---fuvuposifakilijukavapa.pdfIn PDF document text
    • http://chichen.asia/ckfinder/userfiles/files/lukad.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/97880894947.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/sevomono.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/5tvbosaqr916o09vlbiv1j8urg/vudovajikure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=acupressure+points+to+induce+labour+how+long+does+it+takePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 18064 bytes
SHA-256: 9bf47ed6f118dc2163a9c17eb0bbc75b813fd0aa446b1ec4a91dfeb8bc6d698a
font_01_sfnt_off00012fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 11192 bytes
SHA-256: 6135f40d245033caf93810c2a67c8c92a83f27a008510aeeeecbf30968a20489
font_02_sfnt_off00014990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1