Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bbad693a874767…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 17:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 77dbce4de04588afd22c5d0609b8b9a7 SHA-1: c9108dbf38bd4b8423384b73c61d1ebd140ff1a7 SHA-256: 62bbad693a8747670278cea33d9fbd5b2dc51784592c3a03b5fa122afad2093f
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and ClamAV as malicious. It contains numerous links, many pointing to domains that appear to be compromised or disposable, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be leveraging these links for initial access, likely via spearphishing attachments, to lead victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://caphegiabao.com/upload/fck/file/wudujaminidenafuratokud.pdf In PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/jevovezubirago.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/18102142811.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/t5d588o1rcq6bl5cfn8sp2lua1/87789602959.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/89372639229.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/tk3f4k3r1tcekm5livj7cujtb8/90218765027.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a034e170309---4734428878.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/34454641c32175a631b7f3c115321bbd/90945042574.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/50287461863.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/84087604715.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/fanabeseboxotuxagakas.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/44958299357.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/lepapifo.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f3e4611b627---mavufekab.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b00cbc863a---fugejesagolefopas.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af97b039e08---jabexiz.pdfIn PDF document text
    • http://boxethai38.comupload/file/lokiluzivoxuvupe.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/049e68dd1620a5e5cd365fafa756f56f/nudewetedowaxaduboko.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/kikepewujew.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/065cb959855d42efdfe5f8246c5a2e09/gapuvokujofopogavave.pdfIn PDF document text
    • https://kultmotor.hu/images/files/fopunivel.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/20932dd7ac55e5e078ed95adb1171574/famibuxivizojedoxuzogim.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/14586524067.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=terapia+poznawczo-behawioralna+beck+pdfPDF 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_off0000df41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 10828 bytes
SHA-256: 9850c60a492cf4642d0a3c3cc15737e99c3b1f4dbcc22afdfd01fa11f57ab207
font_02_sfnt_off00011015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11015 17564 bytes
SHA-256: f4157514e94b79b5219e208a6520e86b8b01255625dc4b0763b6caf57d7f11e6

Open this report in the interactive analyzer, or submit your own file for analysis.