Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74c0c53dc2213f2…

MALICIOUS

PDF

99.0 KB Created: 2021-09-05 05:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4625fcda2f6982e1a29f59fc23e8f384 SHA-1: fce941d0d79b0dce85fe179061f361b264ca1502 SHA-256: f74c0c53dc2213f25418480554e05872ff8f05670ddccf0c458a61fa70723458
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the detection results point towards a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=sram+force+1+groupset+manual PDF link annotation
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/13e328ed88941e57bca71d2678f39dc2/47041674679.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610fad8d49bec---subamowumefubawanuna.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/dopuzidoramukiti.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/p9h7npm3se4r68mdka832qrago/25214534492.pdfIn PDF document text
    • http://laduses.nl/image/file/zutojir.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/rewosodawasosotametibarex.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/vawadimupe.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/14045464671.pdfIn PDF document text
    • http://stromzeleny.cz/file/31306846252.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/dezujuzofepisoniju.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/jidinewonusozode.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/vebemekunovofakejokixu.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/56028472951.pdfIn PDF document text
    • http://strandedtattoo.net/file/welemedowatuxizotava.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7e03cd630374f73fbba6671f02f63560/99260126580.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/39274666c59b5d954b462cacc7f9e20d/61910898581.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5f05a36f5f0072692bc39d36d239b8c0/musowilubip.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/40sli7ogi93kl3pldabf0nkjo5/98695088755.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610480fe216e6---47191674050.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/12deed88fdea4a3c56e7b17354f915a1/66101043172.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/xileno.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab21f00a396---35085496071.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_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 10960 bytes
SHA-256: 59860255dcc1e8f434af0f858881d412852a6b7a7fa9a2d5560edeca5ddc7dc9
font_01_sfnt_off0001326f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A81 20116 bytes
SHA-256: a9f10bf17ac11ce6b7dbbffff4c042464fb933dbd5fceaa78b8b6999c55640d6

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