Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ace6902bdb66fb…

MALICIOUS

PDF

85.9 KB Created: 2021-06-25 22:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4bea580f9b2e66b5605f562dbd799490 SHA-1: 6eb48dd59dffb864994da9a22ccc200f4f011c68 SHA-256: c0ace6902bdb66fbbe3776f8c2877306dfafea2bfe3cda6cc0ca7aa33937ab75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mazdooradda.com/userfiles/file/muxababopiderovusodi.pdf In PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608daff04f180---47608177656.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/19060621f8b5bf50acd7be6303fd156b/54700124621.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/vojejotiguxiboxotede.pdfIn PDF document text
    • http://tipiland.net/upload/file/ruvojugabefituf.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/14421068433.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/ritiremebawegopujuzovebo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081247a74385---patebaferinivogel.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/nepofiki.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/747d2bb0d399394da62b6e422ad10eb0/3434787956.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/jipijeripizas.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c98e080be0d---wakegen.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021614181548.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/bc8206a4f25f5e696cba94a1a32d5759/gofemalopuzu.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/wofaworag.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4de5861298631e163eaa8f80a8ec6daa/dedivelapefotef.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52181ea405---waletu.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/keresixawowavip.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/xosaxigiwubisevusifadepuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=first+certificate+mock+testPDF 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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 19388 bytes
SHA-256: 3e20a824075581aab030ad953767c68cc3d14919ee9776c9954ba8db02369597
font_01_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 10416 bytes
SHA-256: 95212c91e7bb5b95b3122e8ec25f2c3fdf9cb3c055e00ffc8bb542788a954da7
font_02_sfnt_off000132c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1