Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc930b6072ac0fc4…

MALICIOUS

PDF

84.6 KB Created: 2021-06-28 19:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7d8efc1ee11b97e008558d399ef6dc5b SHA-1: 65408f1c8ef7749adba0991e617078df2db58bcf SHA-256: cc930b6072ac0fc48e09582d3c6bb48d072765e81db7c4c06091dcdca42eff4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal numerous external URIs and links to compromised CMS upload storage, suggesting the PDF acts as a lure to redirect users to malicious websites. The presence of embedded URLs and link farms on disposable hosting further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://garglob.ru/uplcv?utm_term=70+effaced+not+dilated PDF link annotation
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/jinkl77crll9rgt0f48qinkcbf/63251143661.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa80ed07a---zawazusoxenokuwafozeret.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7a2b1b0e---wunebukovip.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/fijiralojalija.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f47b07904---79331830113.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/lb6jatt9n3jnnsoqgskp0fjt3p/pepaxavopunixijewixuma.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608492d802987---89251523090.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/73688496313.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/13677305786.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/94915195277.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/c252997f87b3812e4baa08dc162e425e/68566238275.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/m0f12ptcsps628i0te7h78arn7/memigatakabixidato.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/73670991965.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9190ee5df87ce9a7716d46819a1327d8/63425762894.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/29790087902.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/6d46f43eedef82cb6e0f7d74b578795c/pezazovokapebapetaran.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/85034874746.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/f4a3663064d24f50593ec550d895ab3c/vudewedaxupuvizo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099818c13342---gevixujafufuw.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/n3fmpmq9suprqmkcql9gc4mh0i/42848894599.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/zonawoxa.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c69a7e61b7---takuwivivafoze.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/96284806263.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b368ef6327c---47388786540.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_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 10276 bytes
SHA-256: 6e2ef598cb067f8fd279b946d30c187c89f73401f17a60d962fee9077e01ef71
font_01_sfnt_off0000ffbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 17052 bytes
SHA-256: f0009c7df2e2c773f61e2b30837b18a3edada0bc6d0e4d78a8b0ca924b6d28f0
font_02_sfnt_off00012c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1