Malicious PDF — malware analysis report

Static analysis result for SHA-256 5492717a0020c818…

MALICIOUS

PDF

87.1 KB Created: 2021-02-20 13:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e8184e5cc87f960a6d180c52e49f1a1b SHA-1: 0183854b7397bbf24ba97a804b65cdc6e49b331d SHA-256: 5492717a0020c81864457d8601e87789bf101c0e5385a12e1443cbc95b85a354
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially leveraging embedded JavaScript for obfuscation or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/wix?keyword=the+mughal+empire+in+india+worksheet+answers PDF link annotation
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/4334209.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/3810528.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/bameve.pdfIn PDF document text
    • https://dujemezore.weebly.com/uploads/1/3/1/3/131381607/731568.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/f45c22a5ecd1eb6.pdfIn PDF document text
    • https://geguxawuxereko.weebly.com/uploads/1/3/1/3/131379712/81b3ee1b69e4e6.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/napopapoz.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/nakuwoxajetej_dekebiditobilop.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/vebawadakakem-jefexemag-jinawu-gepirozapef.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/nifomon-vipasazitik-ramonofaxotedur.pdfIn PDF document text
    • http://afracheat4.xyz/929716792310xths.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukajevo/cartoon_sub_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/89316303237.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/daintree_rainforest_self_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/insurgency_sandstorm_coop_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/akibat_anemia_pada_ibu_hamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/wedding_anniversary_song_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/brusters_nutrition_information.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://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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 5476 bytes
SHA-256: 5d368d3e56fd1241faaa58780dd16b80fc183fd76b84f08f3eed180c787d4d47
font_01_sfnt_off00011537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11537 10468 bytes
SHA-256: d5304434ab96bb53aad2f1cf480561219d8902bca55cf3e01b754b446194fe4b
font_02_sfnt_off00013943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13943 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3

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