Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce5d1b67a175174…

MALICIOUS

PDF

96.2 KB Created: 2021-07-02 07:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 917eb6e2bb7d6f766aaddf69e1673e6e SHA-1: 326fa090f12594e524898c10789bd6f4a9c28fe9 SHA-256: 5ce5d1b67a175174cb33612bce1c06afafdd05ad00f9f014c5761ddbab769890
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=enactment+in+a+sentence PDF link annotation
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc3a643655---gujotusurani.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160aac75069596---87980589193.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/xekofuval.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/bigipujoxileleki.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/75670711271.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/befazisuzesudebozoz.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/87198063547.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/clftnimdtvh46iuf934jbs3212/8958872413.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2fd11c0ed9b6714be23a6174bff5b2e6/paboviwebep.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/64061502818.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/hbs9ftri0kqnfpou10tprk4ob4/56805987320.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/79281305767.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/132021aa14aeb4539e026672b002bc83/87682813419.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/77b671ea4a9b42411a8ec86a1f009095/70001821253.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-2/20210702045240576842.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/00la3je626434s1skqhs7ngv47/11172605245.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/93282683273.pdfIn PDF document text
    • http://tafoto.de/img/upload/files/91906562932.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/zuwisifigonazikanulo.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/f30ac8231e380fbd395bb7a0da63b3bc/dabijegakekulosotaz.pdfIn PDF document text
    • https://inncredel.com/uploads/voneziniwa.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/89716285832.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1755d2f863---babusatiwul.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 16672 bytes
SHA-256: 10914195fcfd085c7c4f6e05932702c11cb53f62731d055bb3506b238a2ed774
font_01_sfnt_off00014507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14507 10108 bytes
SHA-256: be1576dd5bcfdb8817693022cb269f588bde4baaa5b0c26207789858b501f78d
font_02_sfnt_off00015b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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