Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7c78111d6e4b67…

MALICIOUS

PDF

90.5 KB Created: 2021-07-05 09:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 39fdf975c538ae1e5ab6f3abc5d455ae SHA-1: 9a97e3bf6f608b13260af2647b47fa38936faece SHA-256: 1d7c78111d6e4b679ef67efb347ed9ded804bb1f82c876329ec838d6d834d550
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and potentially disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and links to compromised CMS uploads indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://drafthe.ru/uplcv?utm_term=meaning+of+differently+abled PDF link annotation
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/fd6e455d6ee999837f086842043a37e6/32349446472.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160995fc931666---5634531252.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/tirapudiz.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/zizibepisikuguranapug.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d68a019956---32737141480.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/47560174253.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c65ad1cd73---gapebuvisudizajep.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080a56b61181---tametegilidobuveneliviwi.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/jotog.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b432b50a218---jasokadomopuwitedamete.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/xutopunizokoliwijimofuba.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a474214e976---77049412735.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/285f1qvvls6qqhe78m9oi71p54/51118473092.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/72346591942.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ef02e1128---selokovamam.pdfPDF link annotation
    • http://starsunited.at/upload/files/pubuxarubowemiborawuloj.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3835fe093a---69966308856.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c07acb7b1c---72590063548.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/03700780422aa3cc9555cc294def6824/86721872797.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2b2763e5accccf1ed7b2b718f2e56e6a/zivefepojugasurope.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/16132f4f5e10f676cf4a9df884cfc5c8/fosilabefin.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/jabaperosamivo.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/39955899603.pdfIn PDF document text
    • 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_off0000fecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 10608 bytes
SHA-256: fa536d98f337775075ecbafd4454dc6ae212fcdaffeab1e29fb40b6fecf27a30
font_01_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 17076 bytes
SHA-256: be1e7cdafa059ef96b1a85548fc6788aa5bfc99a01f27948bf70aab54b3ce0c4
font_02_sfnt_off00014352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14352 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1