Malicious PDF — malware analysis report

Static analysis result for SHA-256 47885a2eaf7f8f71…

MALICIOUS

PDF

84.3 KB Created: 2021-08-21 13:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e4c6944a02959b0246bcbad2a551eba6 SHA-1: 0fa3d17b8de2796e5f42f16d695872f02f6482af SHA-256: 47885a2eaf7f8f71f3235f72a2a793ff9edc1748620ce34a3216193f083661dd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7105c389---rubevuzuxivusipemade.pdf In PDF document text
    • http://albertopizzetti.it/userfiles/files/zowijetuw.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac930960f9e---2656628116.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/41543540883.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abdf981c01---55212962514.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8c989b19a724e29c4153dd27e48972b9/rojewamubisizezus.pdfIn PDF document text
    • https://anaksemut.com/contents//files/naturidimovirode.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/lejegarewometetiralonar.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9654b62df---80767309415.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/gowafumovotanix.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/75139533315.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/wekefesubuxojil.pdfIn PDF document text
    • http://clingac.es/d/files/govosumorajafuda.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/tanulanevekobimogifu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d1e895567b6b5fec1ff3358696e0d570/63575092379.pdfIn PDF document text
    • http://idroter.org/userfiles/files/77647537563.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/jowisozivegi.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/578f26390cf99d2252b4dc00bc53b132/40631972763.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/17550041942.pdfIn PDF document text
    • http://www.puhito.hu/uploads/gevujufojuduzijusokodi.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca57c4332a---nawajotavim.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/46h4occ0oer7f49rv65geejj82/depejapininulodepu.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/sikasusudefotepasigifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ark+dino+spawn+locations+valgueroPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 11016 bytes
SHA-256: bd1980cec6e6e2045c5be2ecfb705573af1f088f2732e65e6c1c60b82064b7fc
font_02_sfnt_off00010d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 1728 bytes
SHA-256: 3e54697433f258519e59b5d4193970bd3702f67e639bb31f2dfcde737eb7fc9e
font_03_sfnt_off0001156b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156B 17596 bytes
SHA-256: f38d026fac3face442fad5732d84dc8188c0072393e13e4d5f3f9cadf325df5d

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