Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc245191ea2edbd4…

MALICIOUS

PDF

85.7 KB Created: 2021-03-22 09:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b27e4ea045be1ab8f06c2fbb4b455722 SHA-1: 796119de96d71781a7d7692d65c51801f9f61afb SHA-256: cc245191ea2edbd45b1bcef63b19019aaf68e21770f3ea5a796d7512dd870d4a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to SEO-optimized domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/award?keyword=estructura+de+la+amilosa+y+amilopectina+pdf PDF link annotation
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/714460.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/atmsfera_unam.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/56163150166.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/james_and_the_giant_peach_summary_chapter_36.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/nubej.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/liverpool_vs_arsenal_match_report.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/nenolu.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/7277756883.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/xodejutirofudijebuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/cdc_flu_vaccine_administration_guidelines.pdfIn PDF document text
    • https://misapunuzure.weebly.com/uploads/1/3/1/6/131606411/xokibagis-radev.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/can_i_upload_my_dna_from_myheritage_to_23andme.pdfIn PDF document text
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/fumokolo-gemijamiwajufo-nebizowoxakuw-zilowosekeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/divonusikijili.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_882211b733224c82982102778ca0e59f.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_037b2b2fc2b940e7baec32e36cc3b31f.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_42c19cd3374f461bb5a3979068ef71d6.pdf?index=trueIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_f924dffbe99347c9be112f4e27a6f696.pdf?index=trueIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_03546ff1f97349c8bbda2ba4284f939e.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_78c7744283da466ca5ed99abdffaa53c.pdf?index=trueIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_7cf99112a456430e9b076503e50838c1.pdf?index=trueIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_13478fb674c3467d96d4a45eb1ca7827.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 5360 bytes
SHA-256: a8a3a1489623cf40b75c32b6bfd8b064060d87f175efcc4208caa7dbacc79987
font_01_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 11868 bytes
SHA-256: 965d8429fd32f0ec4cc6df43491ae66724d5499655eedbc4ab6526d3824115e7
font_02_sfnt_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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