Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8b3958148a9775…

MALICIOUS

PDF

74.8 KB Created: 2021-02-25 03:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8adfdc3dabaf1e9877ab2fd56f732fea SHA-1: 18529e9cca7fa767ce4631eec482f4fabe17dd09 SHA-256: ae8b3958148a9775787c9bbb7e4e740d4a548bec104b9b5d9569ac7bcc484c43
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely lead to malicious content or phishing sites, and the document's structure suggests it's designed to appear as a legitimate resource to trick users into visiting these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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/aws?utm_term=pharmacology+and+the+nursing+process+9th+edition+pdf+study+guide PDF link annotation
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/8643486.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/37317708485.pdfIn PDF document text
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/rodule.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/mawiveliti_popepixekate_fevazekifogotok_sikatuwemup.pdfIn PDF document text
    • http://aviabileti.ru/paruxipezuselupavadbch19.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/7481744.pdfIn PDF document text
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/2459924b042f720.pdfIn PDF document text
    • https://mewupevubuk.weebly.com/uploads/1/3/5/3/135387541/ponifetewakapep.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/54889074078.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/solowisasowi-solaf.pdfIn PDF document text
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/9518833.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/3574038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widifusi.myartsonline.com/calories_in_taco_bell_shredded_chicken_soft_taco.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/how_does_figure_drawing_help.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/free_fireworks_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/ansible_template_create_parent_directory.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/batman_cavaleiro_das_trevas_hq.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/springfield_ar_15_stock_kit.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE501 5828 bytes
SHA-256: 19258c086482f168b3afc67ff70e7f8ca5fee3a84910eeb643e1328ca73079bd
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 10904 bytes
SHA-256: 03ffccf9455e6cec078b560377d08d67edbbdbcc11f564fc486f5a35c8eb8097

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