Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd366db811c8cac…

MALICIOUS

PDF

87.0 KB Created: 2021-08-02 17:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2f2d333012a3df9bd92de874e0bcbb68 SHA-1: d11c17d84db63769a393791e01a2ba97b3602766 SHA-256: fcd366db811c8cac1494680b2318ce79a362c2213a17d7c2c0478268f9733ec6
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. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The primary URL, 'https://pistant.ru/uplcv?utm_term=how+much+does+a+2020+kia+sportage+cost', indicates a potential search result manipulation or phishing attempt related to car pricing. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution vector.

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 https://pistant.ru/uplcv?utm_term=how+much+does+a+2020+kia+sportage+cost PDF link annotation
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070452c47402---49496554325.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a74eee570---73097172930.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/koropipowirisasulo.pdfIn PDF document text
    • https://eventaipei.com/upload/files/54154915289.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160712b7cd1072---79375707716.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a021f0332d---62753549252.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/b7l8rgh6e2giv7p8qn8f9u1j95/45636917459.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/7eaadf0e5abbfa8bc0e3dc0463e9801f/xolunigolugiwujo.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0a4bacabc5a814497280bb27a239252b/31014726549.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/43696092973.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/de819837b1980a1b8f56f12da5858a43/50103801523.pdfIn PDF document text
    • https://phuquiland.com/upload/files/38867947261.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/redoxarakepara.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/6a025292cda836c7c58726bcf128b3ed/77118304974.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/10357335911.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2bejj23o4u1pmfri8mj5munmqa/mumaxajediriboxikajatano.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1969a69f78---30827239285.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6dd691edf3---filigogid.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/92383633861.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/pajikix.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/91780126777.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/madelopovoberidaforu.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/d679d8de3597273a6ccab0d9f9cd9e5a/gotolevujepamezoz.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/093dce06e8f34f4b1ced9ddbe62dfe27/26471011938.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_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10716 16640 bytes
SHA-256: 6ba565c30b52e78cbd63636d26127c486a28d3c83750f44495388de44ccb368c
font_02_sfnt_off00013241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13241 11320 bytes
SHA-256: 03423410ca64896be1495d51bbe736a878bc435078498fd9a2ed1ac5bd39caa9